Foot-pound to Watt-hour Converter

One Foot-pound equals 0.0003766160968 Watt-hour (1 ft-lb = 0.0003766160968 Wh). Multiply a Foot-pound value by 0.0003766160967 to get the equivalent in Watt-hour. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.

Formula

Wh = ft-lb × 0.0003766160967

Multiply the Foot-pound value by 0.0003766160967 to get the equivalent value in Watt-hour.

Example Conversions

1 Foot-pound (ft-lb)

0.0003766160968 Watt-hour (Wh)

5 Foot-pound (ft-lb)

0.001883080484 Watt-hour (Wh)

10 Foot-pound (ft-lb)

0.003766160967 Watt-hour (Wh)

25 Foot-pound (ft-lb)

0.009415402419 Watt-hour (Wh)

100 Foot-pound (ft-lb)

0.03766160967 Watt-hour (Wh)

Conversion Table

Common conversion values from Foot-pound to Watt-hour
Foot-pound (ft-lb) Watt-hour (Wh)
0.1 0.00003766160967
0.5 0.0001883080484
1 0.0003766160968
2 0.0007532321935
5 0.001883080484
10 0.003766160967
25 0.009415402419
50 0.01883080484
100 0.03766160967
250 0.09415402419
500 0.1883080484
1000 0.3766160968

How to Convert Manually

Use these steps to convert Foot-pound values to Watt-hour without the calculator.

  1. Write down the value in Foot-pound (ft-lb) that you want to convert.
  2. Multiply that value by 0.0003766160967.
  3. For example, 10 Foot-pound × 0.0003766160967 = 0.003766160967 Watt-hour.
  4. Label the result as Watt-hour (Wh).

Relative Size Comparison

1 Foot-pound
1 Watt-hour2655.223737Foot-pounds
1Wh

This chart shows the visual difference in size between exactly one Foot-pound and one Watt-hour.

About Foot-pound and Watt-hour

The foot-pound is about 1.3558 joules — the work of one pound-force through one foot. US mechanical engineering and firearm muzzle energy use foot-pounds. The watt-hour is exactly 3,600 joules — one watt sustained for one hour. Battery capacities for phones, laptops, and e-bikes are rated in watt-hours. One Foot-pound equals 0.0003766160968 Watt-hour (1 ft-lb = 0.0003766160968 Wh). Foot-pound to Watt-hour conversion comes up most often in US mechanical engineering and in firearm muzzle energy, typically when figures need restating for battery capacity ratings.

Precision and Rounding: Energy factors mix exact definitions (1 kWh = 3,600,000 J; 1 cal = 4.184 J thermochemical) with measured conventions (1 BTU ≈ 1,055.056 J). Nutrition and utility bills round to whole units; engineering heat calculations should keep the full factor until the final step.

Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).

Worked Example

15 Foot-pound equals 0.005649241451 Watt-hour.

15 ft-lb × 0.0003766160967 = 0.005649241451 Wh

FAQ

How do I convert Foot-pound to Watt-hour?

Multiply the Foot-pound value by 0.0003766160967 to get the equivalent value in Watt-hour.

What is the formula for Foot-pound to Watt-hour?

The formula is Wh = ft-lb × 0.0003766160967.

How many Watt-hour are in 1 Foot-pound?

1 Foot-pound equals 0.0003766160968 Watt-hour.

Can I convert Watt-hour back to Foot-pound?

Yes. 1 Watt-hour equals 2655.223737 Foot-pound, and the related converter can reverse the calculation.

What are common names for Foot-pound and Watt-hour?

Foot-pound is shown as ft-lb and may also be searched as foot-pound, foot pound, ft·lb. Watt-hour is shown as Wh and may also be searched as watt hour, watt-hour.

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