Practitioner tool
g/hp-hr to lb/hr Converter (Engine Emissions)
Convert engine emission factors between g/bhp-hr and lb/hr, with tons per year at the hours you enter.
Engine standards and manufacturer data are often in grams per brake horsepower-hour. Permits and inventories need pounds per hour and tons per year.
g/hp-hr to lb/hr calculator
- Mass rate
- 2.2046 lb/hr
- Annual
- 9.6562 tons/yr
Steps
- lb/hr = 1 g/bhp-hr × 1,000 bhp ÷ 453.59237 g/lb = 2.2046
- tons/yr = 2.2046 × 8,760 ÷ 2,000 = 9.6562
Questions engineers ask
Where does 453.59237 come from?
It is the exact number of grams in one avoirdupois pound.
More converters: ppm to lb/hr, O2 correction, ppm to lb/MMBtu, lb/MMBtu to lb/hr, lb/hr to tons/yr, ppm to mg/m³, Wet to dry basis.
How this works
Formula
- lb/hr = g/bhp-hr × bhp ÷ 453.59237
- tons/yr = lb/hr × hr/yr ÷ 2,000
Before you rely on the number
- Use the power rating the factor or standard is based on (for example site-rated or nameplate bhp).
- For potential to emit, use the hours your enforceable limits allow, or full-year operation if there is none.
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