Horsepower (Mech) to Horsepower (Elec) Converter

Power Converter

22 units available

Decimals:

From

To

0.999598

1 hp = 0.999598 hp (E)

Formula:

hp (E) = hp × 0.9995976831

With your value: 1 hp = 0.99959768 hp (E)

How big is that?

Everyday references on a logarithmic scale, all expressed in horsepower (mech) so you can sanity-check the result.

LED bulb (1/83 your value)0.0121 hp

Laptop (1/11 your value)0.0872 hp

Your value1.00 hp

Microwave oven (1.3× your value)1.34 hp

Electric kettle (4.0× your value)4.02 hp

Family car engine (1.2e+2× your value)121 hp

Other Horsepower (Mech) to Horsepower (Elec) conversions

2 hp to hp (E)3 hp to hp (E)4 hp to hp (E)5 hp to hp (E)6 hp to hp (E)7 hp to hp (E)8 hp to hp (E)

Horsepower (Mech) to Horsepower (Elec) Conversion Table

Horsepower (Mech) (hp)	Horsepower (Elec) (hp (E))
0.5	0.499799
1	0.999598
2	1.999195
5	4.997988
10	9.995977
15	14.993965
20	19.991954
25	24.989942
50	49.979884
100	99.959768
250	249.899421
500	499.798842
1000	999.597683

Horsepower (Elec) to Horsepower (Mech) Conversion Table

Horsepower (Elec) (hp (E))	Horsepower (Mech) (hp)
0.5	0.500201
1	1.000402
2	2.000805
5	5.002012
10	10.004025
15	15.006037
20	20.00805
25	25.010062
50	50.020124
100	100.040248
250	250.10062
500	500.201239
1000	1,000.402479

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Horsepower (Mech) (hp)

Power

Exact conversion

Mechanical horsepower is exactly 550 ft·lbf/s = 745.699 871 582 270 22 W.

Metric horsepower (PS) is 735.498 75 W — about 1.4 % lower.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Horsepower (Elec) (hp (E))

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Horsepower (Mech) to Horsepower (Elec)

To convert from Horsepower (Mech) (hp) to Horsepower (Elec) (hp (E)), multiply the value by 0.9995976831.

Formula: hp (E) = hp × 0.9995976831

Reverse: hp = hp (E) × 1.0004024788

Step-by-Step Example

Start with your value in Horsepower (Mech). For example: 5 hp
Multiply by the conversion factor: 5 x 0.9995976831
The result is: 4.997988 hp (E)

About Horsepower (Mech)

The horsepower (mech) (hp) is a unit of power. One horsepower (mech) equals 745.6998716 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

About Horsepower (Elec)

The horsepower (elec) (hp (E)) is a unit of power. One horsepower (elec) equals 746 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

Frequently Asked Questions

How many Horsepower (Elec) are in 1 Horsepower (Mech)?

There are exactly 0.9995976831 Horsepower (Elec) in 1 Horsepower (Mech). This means the conversion factor from Horsepower (Mech) to Horsepower (Elec) is 0.9995976831.

What is the formula to convert Horsepower (Mech) to Horsepower (Elec)?

The formula to convert Horsepower (Mech) to Horsepower (Elec) is: hp (E) = hp × 0.9995976831. For example, to convert 10 Horsepower (Mech) to Horsepower (Elec), you would multiply 10 by 0.9995976831.

What is a Horsepower (Mech)?