UnitsConverter

Calorie per Second to Erg per Second Converter

Convert cal/s to erg/s with our free online power converter.

Quick Answer

1 Calorie per Second = 41840000 erg/s

Formula: Calorie per Second × conversion factor = Erg per Second

Use the calculator below for instant, accurate conversions.

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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

Calorie per Second to Erg per Second Calculator

How to Use the Calorie per Second to Erg per Second Calculator:

  1. Enter the value you want to convert in the 'From' field (Calorie per Second).
  2. The converted value in Erg 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 Calorie per Second to Erg per Second: Step-by-Step Guide

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

Formula:

erg/s = cal/s × 41840000

Example Calculation:

1 cal/s = 41840000 erg/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 Calorie per Second and a Erg per Second?

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)

1 erg/s = 10^-7 W = 0.0000001 W = 0.0000000001 kW

Erg definition: 1 erg = 1 dyne⋅cm = 10^-7 joules

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

Common Uses and Applications: cal/s vs erg/s

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

Common Uses for 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.

When to Use erg/s

Astrophysics: Stellar luminosity, cosmic ray power, radiation output. Older Literature: Pre-1960 physics textbooks, historical research. Spectroscopy: Radiation intensity in some fields. Academic: Teaching unit systems, dimensional analysis.

Additional Unit Information

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.

About Erg per Second (erg/s)

How do I convert erg/s to watts?

Formula: W = erg/s × 10^-7 (or erg/s ÷ 10,000,000)

Examples:

  • 10^7 erg/s = 1 W
  • 10^8 erg/s = 10 W
  • 10^10 erg/s = 1,000 W = 1 kW
  • 10^13 erg/s = 1,000,000 W = 1 MW

erg/s to Watts converter →

Why do astrophysicists use erg/s for stars?

Historical: Astrophysics literature established with CGS units (pre-1960) Large numbers: 10^33 erg/s easier to write than 10^26 W in some contexts Convention: Astronomical journals still accept erg/s Transition: Modern papers increasingly use watts or solar luminosity units

Solar luminosity unit (L☉):

  • 1 L☉ = 3.828 × 10^26 W = 3.828 × 10^33 erg/s

Example: Sirius = 25 L☉ = 9.7 × 10^27 W = 9.7 × 10^34 erg/s

How do I convert between erg/s and J/s (watts)?

Relationship: 1 erg = 10^-7 joules

Therefore: 1 erg/s = 10^-7 J/s = 10^-7 W

Examples:

  • 10,000,000 erg/s = 1 J/s = 1 W
  • 10^10 erg/s = 1,000 J/s = 1 kW
  • 3.828 × 10^33 erg/s = 3.828 × 10^26 W (Sun)

What is the Sun's power output?

In different units:

  • Watts: 3.828 × 10^26 W
  • erg/s: 3.828 × 10^33 erg/s
  • Joules/s: 3.828 × 10^26 J/s
  • Horsepower: 5.13 × 10^23 hp

Perspective:

  • Earth receives: ~1.74 × 10^17 W (1.74 × 10^24 erg/s)
  • Only ~0.00000005% of Sun's total output
  • Sun converts ~4 million tons of mass to energy per second (E=mc²)

Why transition from CGS to SI units?

SI advantages:

  • Universal: Works across all fields (not just mechanics)
  • Electrical compatibility: Watts naturally link mechanical and electrical power
  • Simpler prefixes: kW, MW, GW easier than 10^10, 10^13, 10^16 erg/s
  • International standard: Adopted globally since 1960

CGS still used: Some specialized fields (astrophysics, Gaussian units for E&M)

Modern trend: Even astrophysics journals increasingly accept SI units (watts, joules).

Conversion Table: Calorie per Second to Erg per Second

Calorie per Second (cal/s)Erg per Second (erg/s)
0.520,920,000
141,840,000
1.562,760,000
283,680,000
5209,200,000
10418,400,000
251,046,000,000
502,092,000,000
1004,184,000,000
25010,460,000,000
50020,920,000,000
1,00041,840,000,000

People Also Ask

How do I convert Calorie per Second to Erg per Second?

To convert Calorie per Second to Erg per Second, enter the value in Calorie 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.

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What is the conversion factor from Calorie per Second to Erg per Second?

The conversion factor depends on the specific relationship between Calorie per Second and Erg 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 Erg per Second back to Calorie per Second?

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

Learn more →

What are common uses for Calorie per Second and Erg per Second?

Calorie per Second and Erg 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