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Foot-pound per Second to Calorie per Second Converter

Convert ft⋅lb/s to cal/s with our free online power converter.

Quick Answer

1 Foot-pound per Second = 0.324048 cal/s

Formula: Foot-pound per Second × conversion factor = Calorie per Second

Use the calculator below for instant, accurate conversions.

Our Accuracy Guarantee

All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: February 2026Reviewed by: Sam Mathew, Software Engineer

Foot-pound per Second to Calorie per Second Calculator

How to Use the Foot-pound per Second to Calorie per Second Calculator:

  1. Enter the value you want to convert in the 'From' field (Foot-pound per Second).
  2. The converted value in Calorie per Second will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Power category.
  4. Click the swap button (⇌) to reverse the conversion direction.
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How to Convert Foot-pound per Second to Calorie per Second: Step-by-Step Guide

Converting Foot-pound per Second to Calorie per Second involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

cal/s = ft⋅lb/s × 0.324048

Example Calculation:

1 ft⋅lb/s = 0.324048 cal/s

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

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What is a Foot-pound per Second and a Calorie per Second?

1 ft⋅lbf/s = 1.356 W = 0.001356 kW = 0.001818 hp = 4.627 BTU/h

Horsepower relationship: 550 ft⋅lbf/s = 1 hp (745.7 W) exactly

1 cal/s = 4.184 W = 0.004184 kW = 0.0056 hp = 14.29 BTU/h

Note: This uses IT (International Table) calorie = 4.1868 J (standard)

Note: The Foot-pound per Second is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Calorie per Second belongs to the imperial/US customary system.

Common Uses and Applications: ft⋅lb/s vs cal/s

Explore the typical applications for both Foot-pound per Second (imperial/US) and Calorie per Second (imperial/US) to understand their common contexts.

Common Uses for ft⋅lb/s

Physics Education: Teaching power concepts, mechanical work problems. Classical Mechanics: Textbook problems, engineering fundamentals. Historical: Steam engine era calculations (now use hp or kW). Rarely Practical: Most real applications use hp, kW, or watts.

When to Use cal/s

Physics Education: Thermodynamics problems, heat transfer calculations. Older Literature: Pre-SI engineering texts, vintage HVAC data. Scientific: Some chemistry and biology applications. Rarely Modern: Watts or kilocalories per hour preferred today.

Additional Unit Information

About Foot-pound per Second (ft⋅lb/s)

How do I convert ft⋅lbf/s to horsepower?

Formula: hp = ft⋅lbf/s ÷ 550

Examples:

  • 550 ft⋅lbf/s = 1 hp (exact definition)
  • 1,100 ft⋅lbf/s = 2 hp
  • 275 ft⋅lbf/s = 0.5 hp
  • 5,500 ft⋅lbf/s = 10 hp

ft⋅lbf/s to HP converter →

How do I convert ft⋅lbf/s to watts?

Formula: W = ft⋅lbf/s × 1.356

Examples:

  • 100 ft⋅lbf/s = 135.6 W
  • 550 ft⋅lbf/s = 746 W (1 hp)
  • 1,000 ft⋅lbf/s = 1,356 W = 1.356 kW

ft⋅lbf/s to Watts converter →

Why is 1 hp = 550 ft⋅lbf/s?

Historical origin: James Watt (1780s) measured draft horses' work capacity

Experiment: Horse lifting coal from mine

  • Typical horse: Lifted ~22,000 lb⋅ft per minute
  • Watt's marketing: Rated engines at 33,000 lb⋅ft/min (50% safety margin)
  • Conversion: 33,000 ft⋅lbf/min ÷ 60 = 550 ft⋅lbf/s = 1 hp

Modern equivalent: 1 hp = 745.7 W = 0.746 kW

Persists: Still used for engines despite metric system adoption.

How do I calculate power from force and velocity?

Formula: Power (ft⋅lbf/s) = Force (lbf) × Velocity (ft/s)

Examples:

  • Towing 1,000 lb at 10 ft/s: 10,000 ft⋅lbf/s = 18.2 hp = 13.6 kW
  • Lifting 500 lb at 2 ft/s: 1,000 ft⋅lbf/s = 1.82 hp = 1.36 kW
  • Pushing 200 lb at 5 ft/s: 1,000 ft⋅lbf/s = 1.82 hp

SI equivalent: Power (W) = Force (N) × Velocity (m/s)

About Calorie per Second (cal/s)

How do I convert cal/s to watts or kW?

Formula:

  • W = cal/s × 4.184
  • kW = cal/s × 0.004184

Examples:

  • 1 cal/s = 4.184 W
  • 10 cal/s = 41.84 W
  • 100 cal/s = 418.4 W = 0.418 kW
  • 1,000 cal/s = 4,184 W = 4.184 kW

cal/s to Watts converter → cal/s to kW converter →

What is the difference between cal/s and kcal/h?

cal/s = Small calorie per second (rapid power) kcal/h = Kilocalorie (food Calorie) per hour (slower rate)

Conversion: 1 cal/s = 3.6 kcal/h

Usage:

  • cal/s: Physics, instant power measurements
  • kcal/h: Metabolism, HVAC (some regions)

Example: 70W human at rest

  • As watts: 70 W
  • As cal/s: 16.7 cal/s
  • As kcal/h: 60 kcal/h

How do I calculate heat transfer in cal/s?

Formula: Power (cal/s) = Heat (cal) ÷ Time (s)

Example: Melting ice

  • Ice mass: 100 g
  • Heat needed: 8,000 cal (80 cal/g latent heat)
  • Time: 60 seconds
  • Power: 8,000 ÷ 60 = 133 cal/s = 558 W

Heating water:

  • Water: 1 kg (1,000 g)
  • Temperature rise: 10°C
  • Heat needed: 10,000 cal (1 cal/g⋅°C × 1,000g × 10°C)
  • Time: 100 seconds
  • Power: 10,000 ÷ 100 = 100 cal/s = 418 W

Why use watts instead of cal/s?

SI standard: Watts are internationally standardized (1 W = 1 J/s) Simpler: Avoids cal vs kcal vs Cal confusion Electrical: All electrical power in watts Universal: Works across all energy forms (mechanical, electrical, thermal)

Exception: Some nutrition/metabolism research still uses cal/s or kcal/h for historical consistency.

Conversion Table: Foot-pound per Second to Calorie per Second

Foot-pound per Second (ft⋅lb/s)Calorie per Second (cal/s)
0.50.162
10.324
1.50.486
20.648
51.62
103.241
258.101
5016.202
10032.405
25081.012
500162.024
1,000324.048

People Also Ask

How do I convert Foot-pound per Second to Calorie per Second?

To convert Foot-pound per Second to Calorie per Second, enter the value in Foot-pound per Second in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our power converter page to convert between other units in this category.

Learn more →

What is the conversion factor from Foot-pound per Second to Calorie per Second?

The conversion factor depends on the specific relationship between Foot-pound per Second and Calorie per Second. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.

Can I convert Calorie per Second back to Foot-pound per Second?

Yes! You can easily convert Calorie per Second back to Foot-pound per Second by using the swap button (⇌) in the calculator above, or by visiting our Calorie per Second to Foot-pound per Second converter page. You can also explore other power conversions on our category page.

Learn more →

What are common uses for Foot-pound per Second and Calorie per Second?

Foot-pound per Second and Calorie per Second are both standard units used in power measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our power converter for more conversion options.

For more power conversion questions, visit our FAQ page or explore our conversion guides.

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Verified Against Authority Standards

All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.

NIST Reference on Constants, Units and Uncertainty

National Institute of Standards and Technology — Fundamental physical constants and unit conversions

BIPM SI Units

Bureau International des Poids et Mesures — International System of Units (SI) definitions and standards

ISO 80000

International Organization for Standardization — Quantities and units international standards series

Last verified: February 19, 2026