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🔥 Gas Rating Calculator

Imperial stopwatch method & Metric 1-minute test

UK Standard IGE/UP/1B · Net 34.9 MJ/m³ · Gross 38.7 MJ/m³
Time how long it takes for 1 full dial revolution
Stopwatch · counting up
0.0s
Net Input
Data plate match
Gross Input
Incl. latent heat
Flow Rate
Gas consumption
Take a start reading, wait 1 minute, take an end reading
Countdown · 1 minute
1:00
Net Input
Data plate match
Gross Input
Incl. latent heat
Flow Rate
Gas consumption
💡 Typical Boiler Output Sizes
1-2 bed
24-28 kW
2-3 bed
28-32 kW
3-4 bed
32-35 kW
4+ bed
35-42 kW