21 Threads per inch = 8.267717 Threads per centimeter
21 TPI = 8.267717 threads/cm
Conversion Formula
1 TPI = 0.39370079 threads/cm
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Frequency
91 Beat per minute
1.51667 Hertz
bpm → Hz
Area
31 Square Foot
2.879993 Square Meter
ft² → m²
Viscosity
95 Poise
9,500.00 Centipoise
P → cP
Temperature
18 Celsius
291.15 Kelvin
°C → K
Time
33 Week
231 Day
wk → d
Amount of substance
43 Gram molecular weight
43 Mole
GMW → mol