Convert fuel prices in $/MMBtu, $/GJ, or $/therm to electricity prices in $/kWh, $/MWh, or c/kWh using efficiency or heat rate inputs.
Common Mistakes Quick tips
- Entering values in both fields; fill exactly one: fuel price or electricity price.
- Mixing units: $/kWh vs $/MWh (ร1000) and $/kWh vs c/kWh (ร100).
- Ignoring efficiency when comparing delivered electricity from fuelโelectric output price increases by 1/ฮท.
- Assuming all fuels use the same basis; this tool uses 1 MMBtu โ 293.07107 kWh (HHV). If you need LHV, adjust ฮท accordingly.
- Including delivery, demand, or taxes in one price but not the other; keep inputs on a comparable basis.
When to Use This Calculator
- Comparing natural gas prices with electricity tariffs on a common $/kWh basis.
- Estimating levelized fuel cost of electricity for boilers, engines, or turbines given efficiency.
- Translating utility quotes in $/MMBtu, $/GJ, or $/therm to $/kWh or $/MWh.
Input Definitions
- Fuel Price โ per MMBtu, GJ, or therm. 1 MMBtu = 293.07107 kWh; 1 GJ = 277.77778 kWh; 1 therm = 29.307107 kWh.
- Electricity Price โ per kWh, MWh (1000 kWh), or c/kWh (cents per kWh).
- Efficiency (ฮท) โ fraction (0โ1) of fuel energy converted to electricity; leave blank for 100% (fuel energy basis).
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$/mmbtu to $/kwh Formula
The following formulas convert fuel prices in $/MMBtu (or other fuel units) to electricity prices in $/kWh and back; if efficiency is not provided, use ฮท = 1.
- Energy conversions: 1 MMBtu = 293.07107 kWh; 1 GJ = 277.77778 kWh; 1 therm = 29.307107 kWh.
- Price unit conversions: $/MWh = $/kWh ร 1000; c/kWh = $/kWh ร 100.
How do you convert $/MMBtu to $/kWh? Divide the $/MMBtu price by 293.07107 to get $/kWh on a fuel-energy basis, then divide by efficiency (ฮท) to account for conversion losses.
How do you convert $/kWh to $/MMBtu? Multiply the $/kWh price by 293.07107 and by efficiency (ฮท) to get the equivalent $/MMBtu fuel price.
$/mmbtu to $/kwh Conversion Table
| $/MMBtu | $/kWh |
|---|---|
| 1 | 0.003412 |
| 2 | 0.006824 |
| 3 | 0.010236 |
| 4 | 0.013649 |
| 5 | 0.017061 |
| 6 | 0.020473 |
| 8 | 0.027297 |
| 10 | 0.034121 |
| 12 | 0.040946 |
| 15 | 0.051182 |
| 20 | 0.068243 |
| 25 | 0.085304 |
| 30 | 0.102364 |
| * Uses 1 MMBtu = 293.07107 kWh; assumes 100% conversion efficiency (ฮท = 1). | |
Example Problem
Convert $10 per MMBtu to $/kWh at 50% efficiency.
Use the formula: $/kWh = ($/MMBtu รท 293.07107) รท ฮท.
$/kWh = (10 รท 293.07107) รท 0.50 โ 0.034121 รท 0.50 = 0.068243 $/kWh
