| British thermal unit (thermochemical) | Watt second |
|---|---|
| 1 BTUth | 1054.35 W⋅s |
| 2 BTUth | 2108.7 W⋅s |
| 3 BTUth | 3163.05 W⋅s |
| 4 BTUth | 4217.4 W⋅s |
| 5 BTUth | 5271.75 W⋅s |
| 6 BTUth | 6326.1 W⋅s |
| 7 BTUth | 7380.45 W⋅s |
| 8 BTUth | 8434.8 W⋅s |
| 9 BTUth | 9489.15 W⋅s |
| 10 BTUth | 10543.5 W⋅s |
| British thermal unit (thermochemical) | Watt second |
|---|---|
| 15 BTUth | 15815.25 W⋅s |
| 20 BTUth | 21087 W⋅s |
| 30 BTUth | 31630.5 W⋅s |
| 40 BTUth | 42174 W⋅s |
| 50 BTUth | 52717.5 W⋅s |
| 60 BTUth | 63261 W⋅s |
| 70 BTUth | 73804.5 W⋅s |
| 80 BTUth | 84348 W⋅s |
| 90 BTUth | 94891.5 W⋅s |
| 100 BTUth | 105435 W⋅s |
| British thermal unit (thermochemical) | Watt second |
|---|---|
| 500 BTUth | 527175 W⋅s |
| 1000 BTUth | 1054350 W⋅s |
| 1500 BTUth | 1581525 W⋅s |
| 10000 BTUth | 10543500 W⋅s |
| 50000 BTUth | 52717500 W⋅s |
| 100000 BTUth | 105435000 W⋅s |
| 500000 BTUth | 527175000 W⋅s |
| 1000000 BTUth | 1054350000 W⋅s |
| 5000000 BTUth | 5271750000 W⋅s |
| 10000000 BTUth | 10543500000 W⋅s |