Calculadoras Online Grátis
Calculadoras precisas para uso cotidiano e profissional. Sem anúncios intrusivos, sem cadastro, completamente grátis.
Age Calculator
Calculate exact age in years, months, days, hours and minutes from a birth date.
BMI Calculator
Calculate Body Mass Index with metric or imperial units and see your category.
Percentage Calculator
Six ways to calculate percentages, increases, decreases and differences.
Unit Converter
Convert length, weight, temperature, area, volume, speed, time and data.
Read Time Estimator
Paste any text and instantly see reading time, speaking time and readability.
Number Base Converter
Convert between binary, octal, decimal, hexadecimal and any custom base.
Hours to Days
Convert hours to days with configurable decimal precision and optional "days" suffix.
Time to Military Time
12-hour or 24-hour clock to military format with optional seconds, colons and "hours" suffix.
Loan / EMI Calculator
Monthly instalment, total interest and a yearly amortization table for any loan.
Mortgage Calculator
Full monthly payment — principal & interest plus tax, insurance and HOA.
Tip Calculator
Calculate the tip and split the bill between any number of people, with rounding.
Discount Calculator
Sale price and savings from a percentage discount, including a stacked second discount.
VAT / Sales Tax Calculator
Add or remove VAT / GST / sales tax at any rate. See net, tax and gross.
Date Difference Calculator
Exact years / months / days between two dates, plus total days, weeks and weekdays.
Countdown Timer
Live countdown of days, hours, minutes and seconds to any date — deadlines, launches, new year.
Timer / Stopwatch
Stopwatch, countdown and Pomodoro timer all in one. Lap times, alarm chime and auto work/break cycles.
Perguntas Frequentes
As calculadoras são precisas? expand_more
Sim. Usam aritmética JavaScript padrão com precisão de ponto flutuante de 64 bits.
Meus dados de cálculo são salvos? expand_more
Não. Tudo é processado no navegador, nada é armazenado em servidores.
Posso usar as calculadoras financeiras para decisões reais? expand_more
Elas fornecem estimativas úteis. Para decisões financeiras importantes, consulte sempre um assessor.