Calculator hub
Calculators for finance, percentages and daily decisions
Run focused calculations for percentages, loans, interest, discounts, tax and common planning numbers.
Use this calculator hub when the task is not just conversion but a decision based on a formula. The tools cover money, percentages, dates, pricing and health-related estimates with inputs designed for quick checks.
Featured searches: calculate a loan payment for a monthly budget, find the percentage increase from old price to new price, compare compound interest over several years.
- calculate a loan payment for a monthly budget
- find the percentage increase from old price to new price
- compare compound interest over several years
- work out a discount before buying
Featured searches
calculators category
Percentage Calculator
Work out percentages, percentage shares, and percentage change from the numbers you already have.
calculators category
Loan Payment Calculator
Estimate monthly loan payments from amount, rate, and term before you borrow or refinance.
calculators category
Compound Interest Calculator
See how an initial amount grows with compound interest over time, including rate, term, and compounding frequency.
calculators category
Discount Calculator
Find the final price, the amount saved, and the discounted total from any percentage reduction.
Popular tasks
Compare borrowing options
Use the loan payment calculator when you need to see what a monthly repayment may look like before choosing a term or amount. Switch to the simple interest or compound interest calculator if you need to compare growth or cost over time.
Loan Payment Calculator
Handle percentage changes
Use the percentage calculator for shares, ratios and general percentage problems. Choose the increase or decrease tools when you already know the start and end value and want the exact change.
Percentage Calculator
Plan by dates
Use the days between dates calculator when timing matters, such as billing periods, delivery windows or project milestones. It is the right choice when you need an exact day count, not just a calendar guess.
Days Between Dates Calculator
How to choose a tool
When this hub helps
Budget checks
Review payments, discounts and tax before committing to a purchase or quote.
Pricing decisions
Test markup, unit price and discount scenarios before setting or comparing an offer.
Date planning
Measure time spans between events so you can line up deadlines, renewals and deliveries.
All tools
calculators category
BMI Calculator
Enter height and weight to get a BMI value with a clear decimal result and category.
calculators category
Age Calculator
Calculate age from a birth date in years, months, and days.
calculators category
Percentage Calculator
Work out percentages, percentage shares, and percentage change from the numbers you already have.
calculators category
Loan Payment Calculator
Estimate monthly loan payments from amount, rate, and term before you borrow or refinance.
calculators category
Days Between Dates Calculator
Find the number of days between two dates, including exact spans for deadlines, schedules, and date comparisons.
calculators category
Compound Interest Calculator
See how an initial amount grows with compound interest over time, including rate, term, and compounding frequency.
calculators category
Discount Calculator
Find the final price, the amount saved, and the discounted total from any percentage reduction.
calculators category
Percentage Decrease Calculator
Find the new value after a percentage decrease by entering the starting amount and the decrease rate.
calculators category
Percentage Increase Calculator
Work out the new value after a percentage increase, with clear steps and realistic examples.
calculators category
Tip Calculator
Calculate tip and total from a bill amount and tip rate, including split-per-person results.
calculators category
Sales Tax Calculator
Enter a subtotal and sales tax rate to get the tax amount and final total.
calculators category
Markup Calculator
Work out markup percent, selling price, and profit from your cost and target price.
calculators category
Simple Interest Calculator
Work out simple interest, total interest, and maturity amount from principal, rate, and time.
calculators category
Contrast Checker
Compare text and background colors to see the contrast ratio and whether the pairing supports readable UI.
calculators category
Unit Price Calculator
Find the price per unit from a total cost and quantity, then compare packs, sizes, and offers with clear results.
FAQ
Are these calculators financial advice?
No. They provide planning estimates from the inputs you enter and should be checked against contracts, fees and local rules.
Why are calculators split into separate tools?
Separate tools keep the inputs clear, so a discount, loan payment or percentage change is less likely to be mixed up.
When should I use a percentage tool instead of a discount tool?
Use the percentage tool for general percentage questions. Use the discount tool when you are starting from a list price and want the reduced price after a markdown.