How many BTU are in one Calorie (cal)?

1 cal equals 0.003966 BTU. Multiply your Calorie (cal) value by 0.003966 to get BTU.

How do I convert Calorie (cal) to BTU?

Use the formula BTU = cal × 0.003966. For example, 10 cal = 0.039657 BTU.

Koverts/Energy/cal → BTU

🔋 Energy Converter

Calorie (cal) to BTU

1 cal = 0.003966 BTU · Free instant converter, no signup required.

Direct Answer

1 cal = 0.003966 BTU

Formula: BTU = cal × 0.003966. This page supports instant conversion, reference table checks, and related unit links.

About this conversion

This Koverts page converts Calorie (cal) to BTU. It uses the same rules as our Energy Converter — reliable Energy conversions, free and instant.

Calorie (cal) and BTU are units used in Energy Converter. Enter a value above to convert Calorie (cal) into BTU using the standard relationship for this category.

BTU is the target unit on this page. Results come from Calorie (cal) using the same rules as the calculator and the reference table below.

Typical uses

Compare Calorie (cal) and BTU for everyday estimates and planning
Use with homework, DIY projects, and hobby measurements
Read international labels, manuals, and product specs with less guesswork
Educational reference only — verify medical, legal, or engineering use with authoritative sources

FormulaBTU = cal × 0.003966

Common reference values

1 cal = 0.003966 BTU
10 cal = 0.039657 BTU
100 cal = 0.396565 BTU

Tip: 1 cal equals 0.003966 BTU. Multiply your amount by 0.003966 to convert from cal to BTU.

Did you know? Koverts keeps conversion math transparent: you see the factor, the table, and the same rules everywhere on the page.

Educational reference - always verify critical measurements (medical, engineering, legal) with primary sources.

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From

Result

0.003966BTU

1 cal = 0.003966 BTU

Popular conversions

// calorie Conversion table btu

Calorie (cal) (cal)	BTU (BTU)
1 cal	0.003966 BTU
2 cal	0.007931 BTU
5 cal	0.019828 BTU
10 cal	0.039657 BTU
20 cal	0.079313 BTU
25 cal	0.099141 BTU
50 cal	0.198283 BTU
100 cal	0.396565 BTU
250 cal	0.991413 BTU
500 cal	1.982826 BTU
1000 cal	3.965651 BTU

How to convert

Calorie (cal) → BTU

To convert from Calorie (cal) (cal) to BTU (BTU)，multiply your value by 0.003966.

BTU = cal × 0.003966

For example，10 cal = 0.039657 BTU.

// Frequently Asked Questions

How accurate is this converter?▼

Koverts applies standard conversion relationships for Energy. Always double-check results that affect health, safety, contracts, or compliance.

Can I convert other units in this category?▼

Yes. Open the category page or change the “from” and “to” units in the converter to explore every supported pair.

What is 1 cal in BTU?▼

1 cal = 0.003966 BTU.

How is the conversion calculated?▼

BTU = cal × 0.003966.

Can I convert other values?▼

Yes. Use the converter box above to enter any value and get instant results.

// Common related conversions

J → cal

Joule (J) → Calorie (cal)

cal → J

Calorie (cal) → Joule (J)

kcal → kJ

Kilocalorie (kcal) → Kilojoule (kJ)

kWh → kJ

Kilowatt-hour (kWh) → Kilojoule (kJ)

BTU → kJ

BTU → Kilojoule (kJ)

// Related conversions

cal → J

Joule (J)

cal → kJ

Kilojoule (kJ)

cal → kcal

Kilocalorie (kcal)

cal → Wh

Watt-hour (Wh)