Maker math, no fluff
A lightweight, fast set of calculators for people who build: 3D printing, electronics, Arduino and conversions. Everything runs offline in your browser.
Instant
Real-time results as you type. No waiting on a server.
Works offline
Math runs in your browser. No sign-up, no data collection.
Built for makers
Short, clear explanations of why each formula works. No walls of text.
All calculators
3D Printing
Cost, filament and print planning.
3D printing cost
Add material, energy and markup to get the real cost of a part.
Filament weight ↔ length
Find out how many meters of filament equal a part's weight.
Remaining filament on spool
Find out how many meters of filament remain on your spool.
3D printing time estimator
Estimate how long a 3D print will take.
STL weight estimator
Estimate a 3D model weight before printing.
Cosplay STL scale
Find the correct scale to fit STL models to your body.
EVA foam calculator
Find how many EVA sheets you need.
Paint quantity calculator
Estimate how much paint you need.
Prop scale calculator
Scale cosplay props to your body size.
Electronics
Circuits, resistors and Arduino math.
AWG converter
Convert AWG wire gauge to diameter.
Battery runtime
Estimate how long your electronics project will run.
RC time constant
Calculate RC charging time.
Voltage divider
Calculate output voltage using two resistors.
Ohm's law
Enter voltage and current to find resistance and power.
LED resistor
Find the right resistor to drive an LED without frying it.
Voltage, current and power
Calculate voltage, current and power relationships.
Conversions
Units and measurements used at the bench.
Why Calc Maker?
Makers waste time on loose spreadsheets and scattered formulas. Here you get the everyday math in one place, fast and explained.
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