Free online calculators
Calculators
Free calculators for salary, percentages, discounts, loans, dates, VAT, business margins, and freelance planning.
Salary
Salary to Hourly Calculator
Convert annual salary to hourly pay or hourly rate to annual salary.
Open calculator ->Everyday
Percentage Calculator
Calculate percentages, percentage ratios, increases, and decreases.
Open calculator ->Shopping
Discount Calculator
Calculate sale discounts, savings, and final prices.
Open calculator ->Business
Profit Margin Calculator
Calculate profit, margin percentage, and markup.
Open calculator ->Finance
Loan Calculator
Estimate monthly payments, total repayment, and interest.
Open calculator ->Date
Age Calculator
Calculate age in years, months, days, and total elapsed days.
Open calculator ->Date
Date Difference Calculator
Find the number of days, weeks, and hours between two dates.
Open calculator ->Business
VAT Calculator
Add VAT to net prices or extract VAT from gross amounts.
Open calculator ->Freelance
Freelance Hourly Rate Calculator
Estimate a sustainable freelance hourly rate from income goals and billable time.
Open calculator ->Freelance
Project Price Calculator
Estimate a profitable freelance project price from hours, costs, and margin.
Open calculator ->Freelance
Freelance Income Calculator
Estimate freelance revenue, expenses, taxes, and take-home income.
Open calculator ->Practical calculators for everyday tasks
SoloTools combines everyday calculators with specialized freelance tools. Calculations run directly in the browser and do not require an account.