Calculators Tools
Free calculators for percentages, loans, dates, grades, and everyday math.
Handiwork’s calculators take the guesswork out of everyday numbers. Work out a percentage, estimate a loan payment, project compound interest, split a bill, or count the days between two dates — each calculator shows clear results instantly as you type.
They are handy for students, shoppers, travelers, and anyone managing money or deadlines. Pick a calculator below; there is nothing to download and nothing to sign up for.
Five percent modes with live results — percent of, change, add, and subtract.
Split a bill and tip evenly with presets, live totals, and a copyable summary.
Exact age in years, months, and days with a birthday countdown and copyable summary.
Find the exact span between two dates with live results and a copyable summary.
Calculate BMI with your preferred weight and height units, see your category on a visual scale, and copy a summary.
Calculate semester GPA or cumulative CGPA in one place. Switch tabs to use preset or custom grading scales, per-course grade points, credit-weighted semester averages, a visual scale, grading reference, and copyable or downloadable reports.
Calculate monthly loan payments (EMI), total interest, and a yearly amortization breakdown.
Find the sale price and how much you save after a percentage discount, with optional stacked discount and sales tax.
See how savings grow with compound interest, regular contributions, and adjustable compounding frequency.