BTU per Hour (IT) to Kilocalorie per Hour (thermochemical) Converter
Power · unit-converter
Convert BTU per Hour (IT) to Kilocalorie per Hour (thermochemical) with a fixed input and output unit, step-by-step formula line, and reference tables. Linear units use SI watt definitions; mechanical hp uses 550 ft·lbf/s; BTU/h uses the IT BTU; dBm/dBW are logarithmic relative to 1 mW and 1 W. The full Power Converter also includes PS/CV, TR, kVA/MVA, and ft·lb/s.
Calculator
From: BTU per Hour (IT) (btu_hr)
To: Kilocalorie per Hour (thermochemical) (kcal_h)
About BTU per Hour (IT)
BTU per hour expresses thermal power using the IT British thermal unit (≈ 1,055.056 J per BTU), divided by one hour. Common in HVAC equipment ratings.
About Kilocalorie per Hour (thermochemical)
Kilocalories per hour is a thermal power rate using the thermochemical kilocalorie (4,184 J per kcal) spread over one hour.
How to convert btu per hour (it) to kilocalories per hour (thermochemical)
1 btu per hour (it) is equal to 0.2521644007218 kilocalorie per hour (thermochemical) when both are expressed in watt-equivalents:
1 btu_hr = (0.2930710701722222 W ÷ 1.1622222222222223 W) kcal_h = 0.2521644007218 kcal_h
Each btu per hour (it) is defined as 0.2930710701722222 W and each kilocalorie per hour (thermochemical) as 1.1622222222222223 W in this tool, so one btu_hr equals 0.2930710701722222 ÷ 1.1622222222222223 kcal_h = 0.2521644007218 kcal_h.
Let d(btu_hr) be the numeric value in BTU per Hour (IT) (btu_hr), and d(kcal_h) the value in Kilocalorie per Hour (thermochemical) (kcal_h). Then:
d(kcal_h) = d(btu_hr) × (0.2930710701722222 / 1.1622222222222223)
Equivalently, divide by how many btu_hr fit into one kcal_h (watts per kcal_h divided by watts per btu_hr):
d(kcal_h) = d(btu_hr) ÷ 3.96566683139092
Or: kilocalorie per hour (thermochemical) = btu per hour (it) ÷ 3.96566683139092
Examples
Example #1: Convert 1 btu_hr to kilocalorie per hour (thermochemical)
1 btu_hr = 1 btu_hr × (0.2930710701722222/1.1622222222222223) kcal_h = 0.2521644007 kcal_h
1 btu_hr = 1 btu_hr ÷ 3.96566683139092 = 0.2521644007 kcal_h
Intermediate watts: 0.2930710702 W
Example #2: Convert 10 btu_hr to kilocalorie per hour (thermochemical)
10 btu_hr = 10 btu_hr × (0.2930710701722222/1.1622222222222223) kcal_h = 2.5216440072 kcal_h
10 btu_hr = 10 btu_hr ÷ 3.96566683139092 = 2.5216440072 kcal_h
Intermediate watts: 2.9307107017 W
Summary
To convert BTU per Hour (IT) to Kilocalorie per Hour (thermochemical), multiply the value in btu_hr by the ratio of watts per btu_hr divided by watts per kcal_h. Equivalently: value_kcal_h = value_btu_hr × (0.2930710701722222 / 1.1622222222222223). Numerically, 1 btu_hr equals 0.2521644007217973 kcal_h.
Relationship context
Both units are thermal engineering rates (BTU/h, kcal/h). Conversions use fixed watt factors, so results stay consistent with the definitions in this converter. The factor from BTU per Hour (IT) to Kilocalorie per Hour (thermochemical) is 2.521644e-1 (1 btu_hr = 0.2521644007217973 kcal_h).
Conversion tables
| BTU per Hour (IT) (btu_hr) | Kilocalorie per Hour (thermochemical) (kcal_h) |
|---|---|
| 0.1 | 0.0252164401 |
| 1 | 0.2521644007 |
| 2 | 0.5043288014 |
| 3 | 0.7564932022 |
| 4 | 1.0086576029 |
| 5 | 1.2608220036 |
| 6 | 1.5129864043 |
| 7 | 1.765150805 |
| 8 | 2.0173152058 |
| 9 | 2.2694796065 |
| BTU per Hour (IT) (btu_hr) | Kilocalorie per Hour (thermochemical) (kcal_h) |
|---|---|
| 10 | 2.5216440072 |
| 20 | 5.0432880144 |
| 30 | 7.5649320216 |
| 40 | 10.0865760289 |
| 50 | 12.6082200361 |
| 60 | 15.1298640433 |
| 70 | 17.6515080505 |
| 80 | 20.1731520577 |
| 90 | 22.694796065 |
| 100 | 25.2164400722 |