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Derived units

The following table lists units that are derived from or are compatible with the base SI units. Click the name of the unit to get more information about it as well as a conversion calculator and available conversion tables.

Unit name	Symbol	Derived from	SI equivalent
becquerel	Bq	becquerel	1
board	bd	square metre	0.00774192
board foot	fbm	cubic metre	0.002359737216
bohr	a₀	metre	5.29177249E-11
boiler horsepower eq. dir. rad	bhp EDR	square metre	12.958174
British thermal unit (39 °F)	BTU_{39 °F}	joule	1059.67
British thermal unit (59 °F)	BTU_{59 °F}	joule	1054.804
British thermal unit (60 °F)	BTU_{60 °F}	joule	1054.68
British thermal unit (63 °F)	BTU_{63 °F}	joule	1054.6
British thermal unit (International Table)	BTU_IT	joule	1055.05585262
British thermal unit (ISO)	BTU_ISO	joule	1054.5
British thermal unit (mean)	BTU_mean	joule	1055.87
British thermal unit (thermochemical)	BTU_th	joule	1054.35
BTU (International Table) per hour	BTU^IT/h	watt	0.293071
BTU (International Table) per minute	BTU^IT/min	watt	17.584264
BTU (International Table) per second	BTU^IT/s	watt	1055.05585262
bucket (Imperial)	bkt	cubic metre	0.01818436
bushel (Imperial)	bu (Imp)	cubic metre	0.03636872
bushel (Imperial)	bu (US)	cubic metre	0.0440488377086
bushel (U.S. dry level)	bu (US lvl)	cubic metre	0.03523907016688

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