Gigajoule to British Thermal Unit Converter
Energy · unit-converter
Convert Gigajoule to British Thermal Unit with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Gigajoule (gj)
To: British Thermal Unit (btu)
About Gigajoule
One gigajoule is 1,000,000,000 J. Utility-scale and fuel-system reporting commonly use GJ.
About British Thermal Unit
The British thermal unit used here is the IT BTU: ≈ 1,055.056 J. It appears in HVAC, heating equipment, and US engineering data.
How to convert gigajoules to british thermal units
1 gigajoule is equal to 947817.12031331716571 british thermal unit when both are expressed in joule-equivalents:
1 gj = (1,000,000,000 J ÷ 1,055.05585262 J) btu = 947817.12031331716571 btu
Each gigajoule is defined as 1,000,000,000 J and each british thermal unit as 1,055.05585262 J in this tool, so one gj equals 1,000,000,000 ÷ 1,055.05585262 btu = 947817.12031331716571 btu.
Let d(gj) be the numeric amount in Gigajoule (gj), and d(btu) the amount in British Thermal Unit (btu). Then:
d(btu) = d(gj) × (1,000,000,000 / 1,055.05585262)
Equivalently, divide by how many gj fit into one btu (joules per btu divided by joules per gj):
d(btu) = d(gj) ÷ 0.00000105505585
Or: british thermal unit = gigajoule ÷ 0.00000105505585
Examples
Example #1: Convert 1 gj to british thermal unit
1 gj = 1 gj × (1,000,000,000/1,055.05585262) btu = 947817.1203130001 btu
1 gj = 1 gj ÷ 0.00000105505585 = 947817.1203130001 btu
Example #2: Convert 10 gj to british thermal unit
10 gj = 10 gj × (1,000,000,000/1,055.05585262) btu = 9478171.2031299993 btu
10 gj = 10 gj ÷ 0.00000105505585 = 9478171.2031299993 btu
Summary
To convert Gigajoule to British Thermal Unit, multiply the value in gj by the ratio of joules per gj divided by joules per btu. Equivalently: value_btu = value_gj × (1000000000 / 1055.05585262). Numerically, 1 gj equals 947817.1203133172 btu.
Relationship context
You are converting between SI energy (joules) (Gigajoules) and US / imperial engineering units (BTU, therm, ft·lb) (British Thermal Units). All values are mapped through joules first. The numeric factor is 9.478171e+5.
Conversion tables
| Gigajoule (gj) | British Thermal Unit (btu) |
|---|---|
| 0.1 | 94,781.7120313 |
| 1 | 947,817.1203130001 |
| 2 | 1,895,634.2406299999 |
| 3 | 2,843,451.36094 |
| 4 | 3,791,268.4812500002 |
| 5 | 4,739,085.6015699999 |
| 6 | 5,686,902.7218800001 |
| 7 | 6,634,719.8421900002 |
| 8 | 7,582,536.96251 |
| 9 | 8,530,354.0828200001 |
| Gigajoule (gj) | British Thermal Unit (btu) |
|---|---|
| 10 | 9,478,171.2031299993 |
| 20 | 18,956,342.4063000008 |
| 30 | 28,434,513.6094000004 |
| 40 | 37,912,684.8125 |
| 50 | 47,390,856.0156999975 |
| 60 | 56,869,027.2188000008 |
| 70 | 66,347,198.4218999967 |
| 80 | 75,825,369.6251000017 |
| 90 | 85,303,540.8281999975 |
| 100 | 94,781,712.0312999934 |