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Ballistics Calculator
Calculate bullet trajectory, drop, and energy
For firearms and projectile motion
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Engine RPM Calculator
Calculate engine revolutions per minute
For automotive and machinery
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Unit Converter
Convert between different units
Length, weight, speed, and more
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Speed Calculator
Calculate speed, distance, and time
For projectiles and moving objects
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๐ Calculation History
โ Frequently Asked Questions
What is RPM in firearms?
RPM (Rounds Per Minute) is the cyclic rate of fire for a firearm, indicating how many rounds it can fire in one minute if continuously firing.
How do I calculate RPM from rounds fired in seconds?
First calculate RPS = Rounds รท Seconds, then convert to RPM = RPS ร 60. Example: 10 rounds in 2 seconds = 5 RPS = 300 RPM.
What's the difference between cyclic and practical RPM?
Cyclic RPM is the theoretical maximum rate. Practical RPM accounts for reloading, aiming, and overheating limitations.
How is RPM used in engines?
In engines, RPM measures rotational speed of the crankshaft. Higher RPM typically means more power but also more fuel consumption.
What's a typical assault rifle RPM?
Most assault rifles fire at 600-900 RPM. The AK-47 fires at 600 RPM, while the M16 fires at 700-950 RPM.