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Megajoules to BTU Converter
↔ Convert BTU to MJ instead

Common Conversions

MJ BTU
0.001 0.948
0.01 9.478
0.1 94.782
0.5 473.909
1 947.817
1.05506 1000
5 4739.09
10 9478.17
50 47390.9
100 94781.7
500 473909
1000 947817

Why this conversion matters in chemistry

Cross-market natural-gas pricing is where this conversion shows up. ISO 6976 reports natural-gas heating value in MJ/m³ at 15 °C, 101.325 kPa — about 38.7 MJ/m³ for pipeline gas. The US convention is BTU/scf at 60 °F, 14.696 psia — about 1039 BTU/scf for the same gas. The ratio of 947.817 BTU per MJ comes from 1 BTU = 1.05506 kJ. The small reference-state mismatch between 60 °F and 15 °C produces about a 0.5% residual that a rigorous Wobbe-index analysis accounts for explicitly. Worth doing carefully when SI gas-calorimetry data ends up reported in the BTU form a US heating-value contract or trading desk uses.

Formula

BTU = MJ × 947.817

Worked Examples

1 MJ = 947.817 BTU

The conversion anchor — one megajoule in BTU.

1.05506 MJ = 1000 BTU

Exactly 1000 BTU — useful as the reverse-anchor scale check.

10 MJ = 9478.17 BTU

10 MJ — about a small heating-system hourly fuel-value figure.

100 MJ = 94781.7 BTU

100 MJ — about a US therm of natural-gas heating value.

Frequently Asked Questions

How do I convert MJ to BTU?
Multiply by 947.817. So 10 MJ becomes 9478.17 BTU. The factor is exact through 1 BTU = 1.05506 kJ.
What's the BTU-to-MJ relationship?
1 BTU = 1.05506 kJ = 0.00105506 MJ, so 1 MJ = 947.817 BTU. The two units are within about 5% — a useful sanity check on any cross-system energy figure.
When does this conversion show up?
Chemical engineering work where US equipment is rated in BTU but process calculations run in SI units. Gas-trading and heating-value contract math also crosses this conversion routinely.