How do you convert metric horsepower to terawatts?

To convert metric horsepower (PS) to terawatts (TW), multiply the power in metric horsepower by 7.354988e-10 (terawatts = metric horsepower × 7.354988e-10).

What is 5 metric horsepower in terawatts?

5 metric horsepower (5 PS) is equal to 3.677494e-9 terawatts (3.677494e-9 TW).

Which is larger, 1 horsepower (metric ps) (PS) or 1 terawatt (TW)?

One terawatt (TW) is larger than one horsepower (metric ps) (PS). Specifically, 1 TW equals 1.359622e+9 PS, while 1 PS is 7.354988e-10 TW.

How do I convert back from terawatts (TW) to metric horsepower (PS)?

To reverse the calculation from TW to PS, multiply your terawatt value by the inverse factor 1.359622e+9 (or divide by 7.354988e-10). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round PS to TW results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 PS ≈ 0.00 TW). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Metric Horsepower to Terawatts Converter

Enter the power in metric horsepower below to convert it to terawatts.

Terawatts to Metric Horsepower (TW → PS)

Convert Metric Horsepower to Terawatts

Enter a value in metric horsepower (PS) to convert to terawatts (TW).

Value (PS)

From

Result

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3.677494e-9terawatts

5 PS = 3.677494e-9 TW

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Suggested Conversions

Reference:NIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))

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Horsepower to Terawatt Conversion Table

Table showing various horsepower measurements converted to terawatts. Click any preset value or arrow to load it into the converter.

Metric Horsepower (PS)	Terawatts (TW)
1 PS	7.354988e-10 TW
10 PS	7.354987e-9 TW
100 PS	0.000000074 TW
1,000 PS	0.000000735 TW
10,000 PS	0.000007355 TW
100,000 PS	0.00007355 TW
1,000,000 PS	0.000735499 TW
5,000,000 PS	0.0036775 TW
10,000,000 PS	0.007355 TW
25,400,000 PS	0.0186817 TW

How to Convert Metric Horsepower to Terawatts

To convert metric horsepower to terawatts, multiply the power by the following conversion ratio: 7.354988e-10 terawatts/horsepower.

Since one horsepower is equal to 7.354988e-10 terawatts, you can use this simple formula to convert:

terawatts = metric horsepower × 7.354988e-10

The power in terawatts is equal to the power in metric horsepower multiplied by 7.354988e-10.

For example, here's how to convert 5 metric horsepower to terawatts using the formula above.

terawatts = (5 PS × 7.354988e-10) = 3.677494e-9 TW

How Many Terawatts Are in a Horsepower?

There are 7.354988e-10 terawatts in a horsepower, which is why we use this value in the formula above.

1 PS = 7.354988e-10 TW|1 TW = 1,359,621,617.3039043 PS

Our horsepower to terawatt calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Metric Horsepower and terawatts are both units used to measure power. Keep reading to learn more about each unit.

What Is a Horsepower?

A horsepower is a unit of power equal to 735.49875 watts (W), the base unit for power. Metric horsepower (75 kgf·m/s = 735.49875 W). [1]

The horsepower is classified as a metric and SI-compatible unit of power. Metric Horsepower can be abbreviated as PS; for example, 1 horsepower can be written as 1 PS.

When working with metric horsepower (PS) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, metric horsepower (PS) are widely used across standard power applications within SI metric workflows, engineering documentation, and technical data sheets.

Learn more about metric horsepower in our Power Converter.

What Is a Terawatt?

A terawatt is a unit of power equal to 1e+12 watts (W), the base unit for power. Equal to 10¹² Watts (1,000 GW). [2]

The terawatt is classified as an International System of Units (SI) unit of power. Terawatts can be abbreviated as TW; for example, 1 terawatt can be written as 1 TW.

In the metric system, "tera" is the standard SI prefix for trillions, or 10¹². This makes the terawatt (TW) a convenient decimal multiple of the watt (W).

In practice, terawatts (TW) are widely used across large-scale industrial, bulk, and macro-level power specifications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.

Learn more about terawatts in our Power Converter.

When converting power between metric horsepower (PS) and terawatts (TW), keep full floating-point precision (1 PS = 7.354988e-10 TW; 1 TW = 1,359,621,617.3039043 PS) during intermediate calculations and round only the final terawatt figure to match your instrument tolerance.

More Horsepower & Terawatt Conversions

Need to calculate in the opposite direction? Use our terawatts to metric horsepower calculator to switch your starting unit immediately. You can also explore related tools such as converting terawatts to metric horsepower, converting metric horsepower to horsepower (hp), or converting metric horsepower to kilowatts.

Convert from Metric Horsepower

Convert to Terawatts

Frequently Asked Questions

There are 7.354988e-10 terawatts (TW) in 1 horsepower (PS). Conversely, 1 terawatt (TW) is equal to 1.359622e+9 metric horsepower (PS).

Power Converter

Quick Info

Direct Factor: 1 horsepower (metric ps) (PS) equals 7.354988e-10 terawatts (TW).
Inverse Factor: 1 terawatt (TW) equals 1.359622e+9 metric horsepower (PS).
Formula: terawatts = metric horsepower × 7.354988e-10.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Horsepower (Metric PS) (PS)

Metric horsepower (75 kgf·m/s = 735.49875 W).

Terawatt (TW)

Equal to 10¹² Watts (1,000 GW).

Watt (W)

Coherent SI unit of power equal to 1 Joule per second (1 J/s).

References

[1]NIST SP 811 · NIST SP 811 App. B.9 (Power & Radiant Flux)
Source
[2]NIST CUU · Derived SI Unit: Watt (W)
Source
[3]BIPM · SI Brochure (9th Ed.) — Power
Source

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References

NIST · BIPM · ISO

[1]
NIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))·Power Metrology Standard — Metric Horsepower (PS) to Terawatts (TW)
NIST SP 811 Standard
[2]
NIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Horsepower (Metric PS) (PS) & Terawatt (TW)
NIST CUU Specification
[3]
BIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (PS to TW)
BIPM Reference

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