Convert BTU per Second to Calories per Second
Convert BTU per Second (BTU/s) to Calories per Second (cal/s) instantly and accurately.
Conversion Formula
cal/s = BTU/s × 251.9957611
About BTU per Second
One BTU per second (BTU/s) ≈ 1,055 W - close to 1 kW but slightly larger. Used when heat rates are so high that per-hour or per-minute numbers become unwieldy. In fire protection engineering, large house fires peak at 500-2,000 BTU/s; industrial fires at millions of BTU/s. Blast characterisation for petrochemical safety and large industrial heat exchangers with duties of millions of BTU/h are conveniently expressed in BTU/s. Since 1 BTU/s ≈ 1.055 kW, conversion to SI is straightforward. 1 BTU/s = 1,055.056 W.
About Calories per Second
One calorie per second (cal/s) = exactly 4.1868 W. It bridges thermochemistry and power: bomb calorimeters and reaction calorimeters characterise exothermic events by cal/s during the reaction interval. Food science uses cal/s to model heat transfer into food during frying or roasting. Since 1 kcal/s = 4,186.8 W, kilocalories per second appear in high-intensity industrial dryers and continuous-flow reactor heat duties. 1 cal/s = 4.1868 W.
Quick Reference Table
| BTU per Second (BTU/s) | Calories per Second (cal/s) |
|---|---|
| 1 BTU/s | 251.996 cal/s |
| 2 BTU/s | 503.992 cal/s |
| 5 BTU/s | 1259.98 cal/s |
| 10 BTU/s | 2519.96 cal/s |
| 25 BTU/s | 6299.89 cal/s |
| 50 BTU/s | 12599.8 cal/s |
| 100 BTU/s | 25199.6 cal/s |