Free Calculators & Reference Tools
Sizing calculators, throw-distance math, time/temp references — all backed by the same product catalog we use for our comparisons. Get the answer, then see the gear that matches it.
Standing Desk Height Calculator
Find your ideal sitting and standing desk heights based on body height. Plus monitor placement.
Air Purifier Size Calculator (CADR)
Enter your room size and get the minimum CADR your air purifier needs — plus matching models.
Projector Throw Distance Calculator
Match your screen size to your room. Get the throw ratio you need and projectors that ship with it.
Sous Vide Times & Temperatures
Pick your protein, cut, thickness, doneness. Get the exact temp + time + safety notes.
Power Station Watt-Hour Calculator
Pick what you want to run and for how long. Get your minimum battery size and matched stations.
Espresso Machine Payoff Calculator
How quickly does an espresso machine pay for itself vs. coffee shop lattes? Plug in your habit.
Rice-to-Water Ratio Reference
The right water, soak, and cook time for every rice type — instantly scaled to your cup count.
Daily Water Intake Calculator
How much water you need per day by body weight, activity, and climate — plus the bottle that fits.
Monitor Viewing Distance Calculator
Optimal sitting distance for your monitor size and resolution. Avoid eye strain.
Pizza Party Calculator
How many pizzas you need to feed everyone, and the minimum oven size to do it.
Multi-Cat Litter Box Calculator
How many boxes a multi-cat home needs by the vet-recommended N+1 rule.
Cordless Vacuum Runtime Calculator
Match your home size and habits to a stick vacuum that won't die mid-clean.