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ToolsUnit ConvertersMass & Force

Energy Converter

Convert between energy and work units. Joules, kilojoules, megajoules, kilowatt-hours, foot-pounds, BTU. Essential for SPT hammer energy and compaction calculations.

Last updated 17 March 2026

Energy / Work

Common references

475 J

SPT hammer energy (60%)

1 kJ

≈ 738 ft·lbf

1 kWh

= 3.6 MJ

1 BTU

≈ 1,055 J