tools / six calculators
The numbers, worked out.
Six calculators for the questions that stop a build night. Every default comes from an official FIRST page or a vendor spec sheet, and the source is printed next to the number.
nothing here needs an account
tools / frc-budget-calculatorfundraising
Team Budget Calculator
What will the season actually cost?
Itemise registration, the drive base, the control system, tools and travel, then print the sheet a sponsor will read.
tools / frc-wire-gauge-calculatorelectrical
Wire Gauge & Voltage Drop
Is this wire thick enough, and is it legal?
Round-trip voltage drop from Ohm's law, checked against the minimum gauge the manual sets for each breaker size.
tools / frc-current-budgetpower
Current Budget & Brownout
Will it brown out when everything runs at once?
Every motor against its own branch breaker, the total against the 120 A main, and the estimated bus voltage against the roboRIO brownout line.
tools / frc-gear-ratio-calculatordrivetrain
Gear Ratio Calculator
Is this ratio fast enough, and can it still push?
Overall reduction, free and adjusted speed, torque at the wheel, pushing force against the traction limit, and whether the draw browns you out.
tools / frc-tipping-calculatordrivetrain
Tip-Over & Stability
How hard can we turn before two wheels lift?
Track width, wheelbase and centre-of-gravity height give the tipping acceleration, the ramp angle, and whether you slide or tip first.
tools / frc-deflection-calculatormechanical
Structural Deflection
Will this arm sag, or bend for good?
Material, cross-section, span and load give the tip or centre sag, the bending stress, and a safety factor against yield.
before you trust a numberFigures track the 2025-26 season and current vendor pricing. FIRST revises fees and wiring rules most years, so check the current Game Manual before an event. None of these tools is a substitute for inspection.