Simple online tools for developers, networking, text and conversions.

Tool Category

Calculators

Useful online calculators for percentages, age, and common tasks.

32 tools in this category

Tools in this category

Percentage Calculator

Calculate percentages, increases, decreases, and percentage changes from simple numeric input.

Age Calculator

Calculate age from a birth date in years, months, and days.

Discount Calculator

Calculate discount amounts, sale prices, and final totals from a price and percentage.

Average Calculator

Calculate the arithmetic mean of a list of numbers quickly.

Ratio Calculator

Simplify and compare ratios between two values quickly.

Percentage Change Calculator

Calculate percentage increase or decrease between two values.

VAT Calculator

Calculate VAT amount, net price, and gross total from a base amount and tax rate.

ROI Calculator

Calculate return on investment and profit percentage from revenue and cost.

BMI Calculator

Calculate body mass index from weight and height.

Date Difference Calculator

Find the difference between two dates in days, weeks, months, and years.

Compound Interest Calculator

Calculate compound growth from principal, rate, time, and compounding frequency.

Loan Calculator

Estimate monthly loan payments, total payment, and total interest from amount, rate, and term.

Time Duration Calculator

Calculate the time difference between two clock times quickly.

Random Number Generator

Generate random numbers between a minimum and maximum value.

GPA Calculator

Calculate GPA from grade points and credits quickly.

Grade Calculator

Calculate a weighted final grade from scores and weights.

Margin Calculator

Calculate profit margin from revenue and cost.

Markup Calculator

Calculate markup percentage from cost and selling price.

Profit Calculator

Calculate profit from revenue and cost instantly.

Commission Calculator

Calculate commission amount and final payout from sales and commission rate.

Sales Tax Calculator

Calculate sales tax amount and total price from base price and tax rate.

Tip Calculator

Calculate tip amount and total bill from bill value and tip rate.

Break-even Calculator

Calculate break-even units from fixed cost, selling price, and variable cost.

Inflation Calculator

Calculate future value after inflation using current value, inflation rate, and years.

Currency Percentage Calculator

Calculate percentage amount, increased total, and reduced total from a money value.

CAGR Calculator

Calculate compound annual growth rate from starting value, ending value, and years.

Savings Calculator

Calculate future savings from starting balance, monthly contribution, rate, and years.

Mortgage Calculator

Calculate monthly mortgage payment from loan amount, interest rate, and term.

EMI Calculator

Calculate EMI from loan amount, annual interest rate, and term in months.

APR Calculator

Calculate APR from loan amount, fees, interest rate, and term.

Hourly to Salary Calculator

Convert hourly pay into weekly, monthly, and annual salary estimates.

Salary to Hourly Calculator

Convert annual salary into hourly, weekly, and monthly pay estimates.