Free Online Calculators for Work, Shopping, Home & Math

Your everyday calculation toolkit

All calculator tools, clearly explained

AllCalco brings practical calculators together in one fast, free workspace. Instead of searching for a new formula every time a number matters, choose a focused tool, enter your figures, and see the answer immediately. The results are designed for everyday decisions: comparing pay offers, checking a restaurant bill, estimating a home project, or understanding a date. Calculations run in your browser, so you can use the site without creating an account or sending personal figures to a server.

Salary, paycheck, and overtime

Use the Salary Calculator to convert annual compensation into monthly, biweekly, weekly, daily, and hourly amounts. The Hourly to Salary Calculator works in the other direction, starting with an hourly rate and estimating annual gross income. Together, these tools make it easier to compare compensation using the same pay period.

For additional hours, the Overtime Calculator estimates regular pay, overtime pay, and total pay from your rate and overtime multiplier. The Paycheck Calculator provides a simplified estimate of take-home pay using 2026 US federal tax assumptions, Social Security, and Medicare. It is an estimate rather than a payroll or tax-filing calculation.

Tips, discounts, and sales tax

The Tip Calculator calculates the tip, total bill, and amount per person for a shared payment. The Discount Calculator shows the discount amount and final price, with an option to include sales tax. The Sales Tax Calculator can calculate sales tax and total price, or work backward from a tax-inclusive price to estimate the pre-tax amount.

Home projects and date calculations

For home projects, the Paint Calculator estimates wall area and paint needed from room dimensions, doors, windows, number of coats, and coverage. The Flooring Calculator estimates floor area, adds a waste factor, and can calculate material cost when you provide a price per square foot.

The Age Calculator compares a date of birth with a reference date and reports age in years, months, and days, along with total days, weeks, and time until the next birthday.

Math and percentage calculations

For everyday number problems, the Percentage Calculator handles percentage-of-a-number, percent-of-whole, and percentage-change calculations. The Fraction Calculator adds, subtracts, multiplies, divides, and simplifies fractions, while the Ratio Calculator simplifies and scales ratios.

Simple, private, and useful

Every AllCalco calculator shows its inputs, result, formula, and assumptions in a readable format. That makes the tools useful for a quick estimate and for checking the math behind an answer. There are no signup forms blocking the result and no need to install software. Use one calculator on its own or move between related tools as your question changes, from hourly pay to a paycheck estimate, from a sale price to sales tax, or from room measurements to a material list. AllCalco is built to make ordinary calculations easier to verify and easier to act on.