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Calorie (small) to British thermal unit (IT) (cal → BTU)

Convert calorie (small) to british thermal unit (it) instantly. The conversion factor below is exact by international definition.

Realtime·energy·metric
Exact
cal
× 0.004
BTU
0.003966
Precision [auto]
6

📐cal to BTU formulaExact

BTU = cal × 0.003965666831
Inverse: cal = BTU × 252.164400721797

Worked example: 1 cal = 0.003965666831 BTU

ℹ️About these units

Calorie (small) (cal)
Source: Thermochemical calorie (NIST).
British thermal unit (IT) (BTU)
Source: International Table BTU.

📊Reference table: cal → BTU

Calorie (small) (cal)British thermal unit (IT) (BTU)
10.003966
20.007931
50.019828
100.039657
150.059485
200.079313
250.099142
500.198283
1000.396567
2500.991417
5001.9828
7502.9743
1,0003.9657

Want a downloadable CSV? Append ?format=csv to the API /api/v1/table endpoint.

🔁Reverse & related

Reverse: BTU → calcal → Jcal → kJcal → MJcal → GJcal → kcalcal → Whcal → kWhcal → MWh

🔌API & widget

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