The answer is one Horsepower Hour [Metric] is equal to 6.328383126195e-10 Megaton [TNT] and that means we can also write it as 1 Horsepower Hour [Metric] = 6.328383126195e-10 Megaton [TNT]. Feel free to use our online unit conversion calculator to convert the unit from Horsepower Hour [Metric] to Megaton [TNT]. Just simply enter value 1 in Horsepower Hour [Metric] and see the result in Megaton [TNT].
Manually converting Horsepower Hour [Metric] to Megaton [TNT] can be time-consuming,especially when you don’t have enough knowledge about Energy units conversion. Since there is a lot of complexity and some sort of learning curve is involved, most of the users end up using an online Horsepower Hour [Metric] to Megaton [TNT] converter tool to get the job done as soon as possible.
We have so many online tools available to convert Horsepower Hour [Metric] to Megaton [TNT], but not every online tool gives an accurate result and that is why we have created this online Horsepower Hour [Metric] to Megaton [TNT] converter tool. It is a very simple and easy-to-use tool. Most important thing is that it is beginner-friendly.
By using our Horsepower Hour [Metric] to Megaton [TNT] conversion tool, you know that one Horsepower Hour [Metric] is equivalent to 6.328383126195e-10 Megaton [TNT]. Hence, to convert Horsepower Hour [Metric] to Megaton [TNT], we just need to multiply the number by 6.328383126195e-10. We are going to use very simple Horsepower Hour [Metric] to Megaton [TNT] conversion formula for that. Pleas see the calculation example given below.
\(\text{1 Horsepower Hour [Metric]} = 1 \times 6.328383126195e-10 = \text{6.328383126195e-10 Megaton [TNT]}\)
Horsepower hour [Metric] is a unit of measurement for energy. It represents an amount of work done by a horse during 1 hour time period. One horsepower hour [metric] is equal to 2647795.5 joules.
The symbol of Horsepower Hour [Metric] is hph. This means you can also write one Horsepower Hour [Metric] as 1 hph.
Megaton [TNT] is a unit of measurement for energy. It refers to the amount of energy released by a megaton of explosive. One megaton [TNT] is equal to 1000 kiloton [TNT].
The symbol of Megaton [TNT] is Mtn. This means you can also write one Megaton [TNT] as 1 Mtn.
Horsepower Hour [Metric] [hph] | Megaton [TNT] [Mtn] | Description |
---|---|---|
1 Horsepower Hour [Metric] | 6.328383126195e-10 Megaton [TNT] | 1 Horsepower Hour [Metric] = 6.328383126195e-10 Megaton [TNT] |
2 Horsepower Hour [Metric] | 1.265676625239e-9 Megaton [TNT] | 2 Horsepower Hour [Metric] = 1.265676625239e-9 Megaton [TNT] |
3 Horsepower Hour [Metric] | 1.8985149378585e-9 Megaton [TNT] | 3 Horsepower Hour [Metric] = 1.8985149378585e-9 Megaton [TNT] |
4 Horsepower Hour [Metric] | 2.531353250478e-9 Megaton [TNT] | 4 Horsepower Hour [Metric] = 2.531353250478e-9 Megaton [TNT] |
5 Horsepower Hour [Metric] | 3.1641915630975e-9 Megaton [TNT] | 5 Horsepower Hour [Metric] = 3.1641915630975e-9 Megaton [TNT] |
6 Horsepower Hour [Metric] | 3.797029875717e-9 Megaton [TNT] | 6 Horsepower Hour [Metric] = 3.797029875717e-9 Megaton [TNT] |
7 Horsepower Hour [Metric] | 4.4298681883365e-9 Megaton [TNT] | 7 Horsepower Hour [Metric] = 4.4298681883365e-9 Megaton [TNT] |
8 Horsepower Hour [Metric] | 5.062706500956e-9 Megaton [TNT] | 8 Horsepower Hour [Metric] = 5.062706500956e-9 Megaton [TNT] |
9 Horsepower Hour [Metric] | 5.6955448135755e-9 Megaton [TNT] | 9 Horsepower Hour [Metric] = 5.6955448135755e-9 Megaton [TNT] |
10 Horsepower Hour [Metric] | 6.328383126195e-9 Megaton [TNT] | 10 Horsepower Hour [Metric] = 6.328383126195e-9 Megaton [TNT] |
100 Horsepower Hour [Metric] | 6.328383126195e-8 Megaton [TNT] | 100 Horsepower Hour [Metric] = 6.328383126195e-8 Megaton [TNT] |
1000 Horsepower Hour [Metric] | 6.328383126195e-7 Megaton [TNT] | 1000 Horsepower Hour [Metric] = 6.328383126195e-7 Megaton [TNT] |
Conversion | Description |
---|---|
1 Horsepower Hour [Metric] = 2509.63 BTU | 1 Horsepower Hour [Metric] in BTU is equal to 2509.63 |
1 Horsepower Hour [Metric] = 632838.31 Calorie [Thermochemical] | 1 Horsepower Hour [Metric] in Calorie [Thermochemical] is equal to 632838.31 |
1 Horsepower Hour [Metric] = 26477955000000 ERG | 1 Horsepower Hour [Metric] in ERG is equal to 26477955000000 |
1 Horsepower Hour [Metric] = 1.6526240352292e+25 Electrovolt | 1 Horsepower Hour [Metric] in Electrovolt is equal to 1.6526240352292e+25 |
1 Horsepower Hour [Metric] = 1952913.75 Foot Pound | 1 Horsepower Hour [Metric] in Foot Pound is equal to 1952913.75 |
1 Horsepower Hour [Metric] = 0.077420921052632 Gasoline [Liter] | 1 Horsepower Hour [Metric] in Gasoline [Liter] is equal to 0.077420921052632 |
1 Horsepower Hour [Metric] = 0.0026477955 Gigajoule | 1 Horsepower Hour [Metric] in Gigajoule is equal to 0.0026477955 |
1 Horsepower Hour [Metric] = 0.98631990076438 Horsepower Hour | 1 Horsepower Hour [Metric] in Horsepower Hour is equal to 0.98631990076438 |
1 Horsepower Hour [Metric] = 23434964.98 Inch Pound | 1 Horsepower Hour [Metric] in Inch Pound is equal to 23434964.98 |
1 Horsepower Hour [Metric] = 2647795.5 Joule | 1 Horsepower Hour [Metric] in Joule is equal to 2647795.5 |
1 Horsepower Hour [Metric] = 2647.8 Kilojoule | 1 Horsepower Hour [Metric] in Kilojoule is equal to 2647.8 |
1 Horsepower Hour [Metric] = 632.84 Kilocalorie [Thermochemical] | 1 Horsepower Hour [Metric] in Kilocalorie [Thermochemical] is equal to 632.84 |
1 Horsepower Hour [Metric] = 0.73549875 Kilowatt Hour | 1 Horsepower Hour [Metric] in Kilowatt Hour is equal to 0.73549875 |
1 Horsepower Hour [Metric] = 2.65 Megajoule | 1 Horsepower Hour [Metric] in Megajoule is equal to 2.65 |
1 Horsepower Hour [Metric] = 2.6477955e-9 Petajoule | 1 Horsepower Hour [Metric] in Petajoule is equal to 2.6477955e-9 |
1 Horsepower Hour [Metric] = 0.0000026477955 Terajoule | 1 Horsepower Hour [Metric] in Terajoule is equal to 0.0000026477955 |
1 Horsepower Hour [Metric] = 0.025102251223924 Therm [US] | 1 Horsepower Hour [Metric] in Therm [US] is equal to 0.025102251223924 |
1 Horsepower Hour [Metric] = 2647795.5 Watt Second | 1 Horsepower Hour [Metric] in Watt Second is equal to 2647795.5 |
1 Horsepower Hour [Metric] = 735.5 Watt Hour | 1 Horsepower Hour [Metric] in Watt Hour is equal to 735.5 |
1 Horsepower Hour [Metric] = 2.6477955e+24 Attojoule | 1 Horsepower Hour [Metric] in Attojoule is equal to 2.6477955e+24 |
1 Horsepower Hour [Metric] = 0.73549875 Board of Trade | 1 Horsepower Hour [Metric] in Board of Trade is equal to 0.73549875 |
1 Horsepower Hour [Metric] = 2511.31 BTU [Thermochemical] | 1 Horsepower Hour [Metric] in BTU [Thermochemical] is equal to 2511.31 |
1 Horsepower Hour [Metric] = 632566.18 Calorie [15 °C] | 1 Horsepower Hour [Metric] in Calorie [15 °C] is equal to 632566.18 |
1 Horsepower Hour [Metric] = 632.42 Calorie [Nutritional] | 1 Horsepower Hour [Metric] in Calorie [Nutritional] is equal to 632.42 |
1 Horsepower Hour [Metric] = 1394.24 Celsius Heat | 1 Horsepower Hour [Metric] in Celsius Heat is equal to 1394.24 |
1 Horsepower Hour [Metric] = 264779550 Centijoule | 1 Horsepower Hour [Metric] in Centijoule is equal to 264779550 |
1 Horsepower Hour [Metric] = 1 Cheval Vapeur Heure | 1 Horsepower Hour [Metric] in Cheval Vapeur Heure is equal to 1 |
1 Horsepower Hour [Metric] = 26477955 Decijoule | 1 Horsepower Hour [Metric] in Decijoule is equal to 26477955 |
1 Horsepower Hour [Metric] = 264779.55 Dekajoule | 1 Horsepower Hour [Metric] in Dekajoule is equal to 264779.55 |
1 Horsepower Hour [Metric] = 0.0025102251223924 Dekatherm | 1 Horsepower Hour [Metric] in Dekatherm is equal to 0.0025102251223924 |
1 Horsepower Hour [Metric] = 73.55 Dekawatt hour | 1 Horsepower Hour [Metric] in Dekawatt hour is equal to 73.55 |
1 Horsepower Hour [Metric] = 2.6477955e-12 Exajoule | 1 Horsepower Hour [Metric] in Exajoule is equal to 2.6477955e-12 |
1 Horsepower Hour [Metric] = 7.3549875e-16 Exawatt Hour | 1 Horsepower Hour [Metric] in Exawatt Hour is equal to 7.3549875e-16 |
1 Horsepower Hour [Metric] = 2.6477955e+21 Femtojoule | 1 Horsepower Hour [Metric] in Femtojoule is equal to 2.6477955e+21 |
1 Horsepower Hour [Metric] = 62833156.54 Foot Poundal | 1 Horsepower Hour [Metric] in Foot Poundal is equal to 62833156.54 |
1 Horsepower Hour [Metric] = 0.020095594262295 Automotive Gasoline [US] | 1 Horsepower Hour [Metric] in Automotive Gasoline [US] is equal to 0.020095594262295 |
1 Horsepower Hour [Metric] = 0.020095594262295 Aviation Gasoline [US] | 1 Horsepower Hour [Metric] in Aviation Gasoline [US] is equal to 0.020095594262295 |
1 Horsepower Hour [Metric] = 0.018071222358722 Diesel Oil [US] | 1 Horsepower Hour [Metric] in Diesel Oil [US] is equal to 0.018071222358722 |
1 Horsepower Hour [Metric] = 0.018071222358722 Distillate #2 Fuel Oil [US] | 1 Horsepower Hour [Metric] in Distillate #2 Fuel Oil [US] is equal to 0.018071222358722 |
1 Horsepower Hour [Metric] = 0.018620221518987 Kerosene [US] | 1 Horsepower Hour [Metric] in Kerosene [US] is equal to 0.018620221518987 |
1 Horsepower Hour [Metric] = 0.018620221518987 Kerosene Type Jet Fuel [US] | 1 Horsepower Hour [Metric] in Kerosene Type Jet Fuel [US] is equal to 0.018620221518987 |
1 Horsepower Hour [Metric] = 0.026278804118192 LPG [US] | 1 Horsepower Hour [Metric] in LPG [US] is equal to 0.026278804118192 |
1 Horsepower Hour [Metric] = 0.019771471774194 Naphtha Type Jet Fuel [US] | 1 Horsepower Hour [Metric] in Naphtha Type Jet Fuel [US] is equal to 0.019771471774194 |
1 Horsepower Hour [Metric] = 0.01675395785877 Residual Fuel Oil [US] | 1 Horsepower Hour [Metric] in Residual Fuel Oil [US] is equal to 0.01675395785877 |
1 Horsepower Hour [Metric] = 0.016733081529035 Automotive Gasoline [UK] | 1 Horsepower Hour [Metric] in Automotive Gasoline [UK] is equal to 0.016733081529035 |
1 Horsepower Hour [Metric] = 0.016733081529035 Aviation Gasoline [UK] | 1 Horsepower Hour [Metric] in Aviation Gasoline [UK] is equal to 0.016733081529035 |
1 Horsepower Hour [Metric] = 0.015047439409403 Diesel Oil [UK] | 1 Horsepower Hour [Metric] in Diesel Oil [UK] is equal to 0.015047439409403 |
1 Horsepower Hour [Metric] = 0.015047439409403 Distillate #2 Fuel Oil [UK] | 1 Horsepower Hour [Metric] in Distillate #2 Fuel Oil [UK] is equal to 0.015047439409403 |
1 Horsepower Hour [Metric] = 0.015504576809182 Kerosene [UK] | 1 Horsepower Hour [Metric] in Kerosene [UK] is equal to 0.015504576809182 |
1 Horsepower Hour [Metric] = 0.015504576809182 Kerosene Type Jet Fuel [UK] | 1 Horsepower Hour [Metric] in Kerosene Type Jet Fuel [UK] is equal to 0.015504576809182 |
1 Horsepower Hour [Metric] = 0.021881680434816 LPG [UK] | 1 Horsepower Hour [Metric] in LPG [UK] is equal to 0.021881680434816 |
1 Horsepower Hour [Metric] = 0.016463193117277 Naphtha Type Jet Fuel [UK] | 1 Horsepower Hour [Metric] in Naphtha Type Jet Fuel [UK] is equal to 0.016463193117277 |
1 Horsepower Hour [Metric] = 0.013950587334002 Residual Fuel Oil [UK] | 1 Horsepower Hour [Metric] in Residual Fuel Oil [UK] is equal to 0.013950587334002 |
1 Horsepower Hour [Metric] = 16526240352292000 Gigaelectronvolt | 1 Horsepower Hour [Metric] in Gigaelectronvolt is equal to 16526240352292000 |
1 Horsepower Hour [Metric] = 7.3549875e-7 Gigawatt Hour | 1 Horsepower Hour [Metric] in Gigawatt Hour is equal to 7.3549875e-7 |
1 Horsepower Hour [Metric] = 632415.09 Gram Calorie | 1 Horsepower Hour [Metric] in Gram Calorie is equal to 632415.09 |
1 Horsepower Hour [Metric] = 6.0732789996866e+23 Hartree | 1 Horsepower Hour [Metric] in Hartree is equal to 6.0732789996866e+23 |
1 Horsepower Hour [Metric] = 26477.96 Hectojoule | 1 Horsepower Hour [Metric] in Hectojoule is equal to 26477.96 |
1 Horsepower Hour [Metric] = 7.35 Hectowatt Hour | 1 Horsepower Hour [Metric] in Hectowatt Hour is equal to 7.35 |
1 Horsepower Hour [Metric] = 0.024354263245033 Hundred Cubic Feet of Natural Gas | 1 Horsepower Hour [Metric] in Hundred Cubic Feet of Natural Gas is equal to 0.024354263245033 |
1 Horsepower Hour [Metric] = 374959439.65 Inch Ounce | 1 Horsepower Hour [Metric] in Inch Ounce is equal to 374959439.65 |
1 Horsepower Hour [Metric] = 632.57 Kilocalorie [15 °C] | 1 Horsepower Hour [Metric] in Kilocalorie [15 °C] is equal to 632.57 |
1 Horsepower Hour [Metric] = 1.6526240352292e+22 Kiloelectronvolt | 1 Horsepower Hour [Metric] in Kiloelectronvolt is equal to 1.6526240352292e+22 |
1 Horsepower Hour [Metric] = 632.42 Kilogram Calorie | 1 Horsepower Hour [Metric] in Kilogram Calorie is equal to 632.42 |
1 Horsepower Hour [Metric] = 270000 Kilogram Force Meter | 1 Horsepower Hour [Metric] in Kilogram Force Meter is equal to 270000 |
1 Horsepower Hour [Metric] = 270000 Kilopond Meter | 1 Horsepower Hour [Metric] in Kilopond Meter is equal to 270000 |
1 Horsepower Hour [Metric] = 6.328383126195e-7 Kiloton [TNT] | 1 Horsepower Hour [Metric] in Kiloton [TNT] is equal to 6.328383126195e-7 |
1 Horsepower Hour [Metric] = 26131.71 Liter Atmosphere | 1 Horsepower Hour [Metric] in Liter Atmosphere is equal to 26131.71 |
1 Horsepower Hour [Metric] = 16526240352292000000 Megaelectronvolt | 1 Horsepower Hour [Metric] in Megaelectronvolt is equal to 16526240352292000000 |
1 Horsepower Hour [Metric] = 26477955 Megalerg | 1 Horsepower Hour [Metric] in Megalerg is equal to 26477955 |
1 Horsepower Hour [Metric] = 6.328383126195e-10 Megaton [TNT] | 1 Horsepower Hour [Metric] in Megaton [TNT] is equal to 6.328383126195e-10 |
1 Horsepower Hour [Metric] = 0.00073549875 Megawatt Hour | 1 Horsepower Hour [Metric] in Megawatt Hour is equal to 0.00073549875 |
1 Horsepower Hour [Metric] = 2647795500000 Microjoule | 1 Horsepower Hour [Metric] in Microjoule is equal to 2647795500000 |
1 Horsepower Hour [Metric] = 2647795500 Millijoule | 1 Horsepower Hour [Metric] in Millijoule is equal to 2647795500 |
1 Horsepower Hour [Metric] = 0.073549875 Myriawatt Hour | 1 Horsepower Hour [Metric] in Myriawatt Hour is equal to 0.073549875 |
1 Horsepower Hour [Metric] = 2647795500000000 Nanojoule | 1 Horsepower Hour [Metric] in Nanojoule is equal to 2647795500000000 |
1 Horsepower Hour [Metric] = 2647795.5 Newton Meter | 1 Horsepower Hour [Metric] in Newton Meter is equal to 2647795.5 |
1 Horsepower Hour [Metric] = 7.3549875e-13 Petawatt Hour | 1 Horsepower Hour [Metric] in Petawatt Hour is equal to 7.3549875e-13 |
1 Horsepower Hour [Metric] = 2647795500000000000 Picojoule | 1 Horsepower Hour [Metric] in Picojoule is equal to 2647795500000000000 |
1 Horsepower Hour [Metric] = 2.5096257932874e-15 Q Unit | 1 Horsepower Hour [Metric] in Q Unit is equal to 2.5096257932874e-15 |
1 Horsepower Hour [Metric] = 2.5096257932874e-12 Quad | 1 Horsepower Hour [Metric] in Quad is equal to 2.5096257932874e-12 |
1 Horsepower Hour [Metric] = 16526240352292 Teraelectronvolt | 1 Horsepower Hour [Metric] in Teraelectronvolt is equal to 16526240352292 |
1 Horsepower Hour [Metric] = 7.3549875e-10 Terawatt Hour | 1 Horsepower Hour [Metric] in Terawatt Hour is equal to 7.3549875e-10 |
1 Horsepower Hour [Metric] = 0.025096257932874 Therm [Europe] | 1 Horsepower Hour [Metric] in Therm [Europe] is equal to 0.025096257932874 |
1 Horsepower Hour [Metric] = 0.63256617611926 Thermie | 1 Horsepower Hour [Metric] in Thermie is equal to 0.63256617611926 |
1 Horsepower Hour [Metric] = 0.0006328383126195 Ton [TNT] | 1 Horsepower Hour [Metric] in Ton [TNT] is equal to 0.0006328383126195 |
1 Horsepower Hour [Metric] = 0.000090345012897678 Tonne of Coal | 1 Horsepower Hour [Metric] in Tonne of Coal is equal to 0.000090345012897678 |
1 Horsepower Hour [Metric] = 0.000063241509028375 Tonne of Oil | 1 Horsepower Hour [Metric] in Tonne of Oil is equal to 0.000063241509028375 |
1 Horsepower Hour [Metric] = 2.6477955e+30 Yoctojoule | 1 Horsepower Hour [Metric] in Yoctojoule is equal to 2.6477955e+30 |
1 Horsepower Hour [Metric] = 2.6477955e-18 Yottajoule | 1 Horsepower Hour [Metric] in Yottajoule is equal to 2.6477955e-18 |
1 Horsepower Hour [Metric] = 7.3549875e-22 Yottawatt Hour | 1 Horsepower Hour [Metric] in Yottawatt Hour is equal to 7.3549875e-22 |
1 Horsepower Hour [Metric] = 2.6477955e+27 Zeptojoule | 1 Horsepower Hour [Metric] in Zeptojoule is equal to 2.6477955e+27 |
1 Horsepower Hour [Metric] = 2.6477955e-15 Zettajoule | 1 Horsepower Hour [Metric] in Zettajoule is equal to 2.6477955e-15 |
1 Horsepower Hour [Metric] = 7.3549875e-19 Zettwatt Hour | 1 Horsepower Hour [Metric] in Zettwatt Hour is equal to 7.3549875e-19 |
1 Horsepower Hour [Metric] = 26477955000000 Dyne Centimeter | 1 Horsepower Hour [Metric] in Dyne Centimeter is equal to 26477955000000 |
1 Horsepower Hour [Metric] = 2647.8 Kilowatt Second | 1 Horsepower Hour [Metric] in Kilowatt Second is equal to 2647.8 |
1 Horsepower Hour [Metric] = 632415.09 Calorie | 1 Horsepower Hour [Metric] in Calorie is equal to 632415.09 |
1 Horsepower Hour [Metric] = 632.42 Kilocalorie | 1 Horsepower Hour [Metric] in Kilocalorie is equal to 632.42 |
1 Horsepower Hour [Metric] = 0.63241509028375 Kilocalorie [Nutritional] | 1 Horsepower Hour [Metric] in Kilocalorie [Nutritional] is equal to 0.63241509028375 |
1 Horsepower Hour [Metric] = 0.00063241509028375 MMKcal | 1 Horsepower Hour [Metric] in MMKcal is equal to 0.00063241509028375 |
1 Horsepower Hour [Metric] = 2.51 MBTU | 1 Horsepower Hour [Metric] in MBTU is equal to 2.51 |
1 Horsepower Hour [Metric] = 2.51 MBH | 1 Horsepower Hour [Metric] in MBH is equal to 2.51 |
1 Horsepower Hour [Metric] = 0.0025096259059886 Mega BTU | 1 Horsepower Hour [Metric] in Mega BTU is equal to 0.0025096259059886 |
1 Horsepower Hour [Metric] = 0.0025096259059886 MMBTU | 1 Horsepower Hour [Metric] in MMBTU is equal to 0.0025096259059886 |
1 Horsepower Hour [Metric] = 0.20913549216571 Refrigeration Ton Hour | 1 Horsepower Hour [Metric] in Refrigeration Ton Hour is equal to 0.20913549216571 |
1 Horsepower Hour [Metric] = 0.000065869446351406 Fuel Oil Equivalent of 1 Kiloliter | 1 Horsepower Hour [Metric] in Fuel Oil Equivalent of 1 Kiloliter is equal to 0.000065869446351406 |
1 Horsepower Hour [Metric] = 0.00041481419933695 Fuel Oil Equivalent of 1 Barrel | 1 Horsepower Hour [Metric] in Fuel Oil Equivalent of 1 Barrel is equal to 0.00041481419933695 |
1 Horsepower Hour [Metric] = 6.328383126195e-13 Gigaton [TNT] | 1 Horsepower Hour [Metric] in Gigaton [TNT] is equal to 6.328383126195e-13 |
1 Horsepower Hour [Metric] = 270000000 Gram Force Meter | 1 Horsepower Hour [Metric] in Gram Force Meter is equal to 270000000 |
1 Horsepower Hour [Metric] = 27000000000 Gram Force Centimeter | 1 Horsepower Hour [Metric] in Gram Force Centimeter is equal to 27000000000 |
1 Horsepower Hour [Metric] = 27000000 Kg Force Centimeter | 1 Horsepower Hour [Metric] in Kg Force Centimeter is equal to 27000000 |
1 Horsepower Hour [Metric] = 374959439.65 Ounce Force Inch | 1 Horsepower Hour [Metric] in Ounce Force Inch is equal to 374959439.65 |
1 Horsepower Hour [Metric] = 1952913.75 Pound Force Foot | 1 Horsepower Hour [Metric] in Pound Force Foot is equal to 1952913.75 |
1 Horsepower Hour [Metric] = 23434964.98 Pound Force Inch | 1 Horsepower Hour [Metric] in Pound Force Inch is equal to 23434964.98 |
Disclaimer | TOS | About | Privacy Policy