Enter a fuel price in $/MMBtu, $/GJ, or $/therm or an electricity price in $/kWh, $/MWh, or c/kWh to convert between them, optionally factoring in generation efficiency.
Common Mistakes Quick tips
- Entering values in both fields; fill exactly one: fuel price or electricity price.
- Mixing units: $/kWh vs $/MWh (×1000) and $/kWh vs c/kWh (×100).
- Ignoring efficiency when comparing delivered electricity from fuel—electric output price increases by 1/η.
- Assuming all fuels use the same basis; this tool uses 1 MMBtu ≈ 293.07107 kWh (HHV). If you need LHV, adjust η 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 $/MWh.
Input Definitions
- Fuel Price — per MMBtu, GJ, or therm. 1 MMBtu = 293.07107 kWh; 1 GJ = 277.77778 kWh; 1 therm = 29.307107 kWh.
- Electricity Price — per kWh, MWh (1000 kWh), or c/kWh (cents per kWh).
- Efficiency (η) — fraction (0–1) of fuel energy converted to electricity; leave blank for 100% (fuel energy basis).
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$/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 η = 1.
\quad \frac{\$}{\mathrm{kWh}} = \frac{\$}{\mathrm{MMBtu}} \times \frac{1}{293.07107} \times \frac{1}{\eta}
\quad\quad- Energy conversions: 1 MMBtu = 293.07107 kWh; 1 GJ = 277.77778 kWh; 1 therm = 29.307107 kWh.
- Price unit conversions: $/MWh = $/kWh × 1000; c/kWh = $/kWh × 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 (η) to account for conversion losses.
How do you convert $/kWh to $/MMBtu? Multiply the $/kWh price by 293.07107 and by efficiency (η) 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 (η = 1). | |
Example Problem
Convert $10 per MMBtu to $/kWh at 50% efficiency.
Use the formula: $/kWh = ($/MMBtu ÷ 293.07107) ÷ η.
$/kWh = (10 ÷ 293.07107) ÷ 0.50 ≈ 0.034121 ÷ 0.50 = 0.068243 $/kWh
