All calculatorsGeneral Calculators & Converters
Versatile tools for academic, study, and everyday calculations across subjects.
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Age Calculator
Calculate exact age in years, months, and days
Annual Income Calculator
Calculate your annual income from hourly, weekly, monthly, or yearly pay.
Average Calculator
Calculate averages and weighted means from any set of numbers
Dog Size Calculator (Puppy Size Predictor)
Estimate your puppy’s adult weight and height from age, size, and breed
Duration Calculator
Calculate the duration between two dates in years, months, and days
Forgetting Curve Calculator
Estimate memory retention and plan optimal review timing
Lottery Tax Calculator
Estimate take-home lottery winnings after federal, state, and local taxes
Prime Factorization Calculator
Find prime factors, all divisors, and step-by-step work for any integer
Test Grade Calculator
Calculate your test grade or required final score with steps