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25% of 80
20
Featured calculators
Worked examples — open one and change the numbers.
Mortgage CalculatorMonthly payment on a home loan
$300,000 home · 20% down · 6.5% · 30 yrs
$1,517/mo
principal & interest
Compound Interest CalculatorWhat an investment grows to
$10,000 · 8% a year · 10 years
$21,589
after 10 years
BMI CalculatorBody mass index for your height
70 kg · 175 cm
22.9
Normal Weight
Percentage CalculatorPercent of a number
What is 20% of 450?
90
20% of 450
Popular calculators
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- Concrete CalculatorCubic yards and bags of concrete for a slab, footing, or column
- Garden Planning CalculatorCalculate plants, seeds, soil, and fertilizer for your garden
- Calorie CalculatorCalculate daily calorie needs (BMR & TDEE) using Mifflin-St Jeor
- Word CounterCount words, characters, sentences, and paragraphs with reading time
- Markup CalculatorPrice from cost and markup, with a markup-to-margin reference table
- Square Footage CalculatorTotal area across rooms in sq ft and m², with cost per square foot
- Moving Cost CalculatorEstimate moving costs for local, long-distance, or DIY moves
- Loan CalculatorCalculate monthly payments for personal, auto, or business loans
- TDEE CalculatorTotal daily energy expenditure and calorie targets by activity level
- kg to lbs ConverterConvert kilograms to pounds and back — 1 kg = 2.20462 lbs
Common questions
Start from what you want to know.
- How much house can I afford?Home Affordability
- How much will my investment grow?Compound Interest
- What is 20% of 450?Percentage
- How many calories should I eat a day?Calorie
- What will my monthly loan payment be?Loan
- How old am I exactly?Age
- What's my paycheck after tax?Take-Home Pay
- How long until I'm debt-free?Debt Payoff
- Is my weight healthy for my height?BMI
- When is my baby due?Pregnancy Due Date
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Planning a wedding
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Finance
40- 401(k) Calculator
- Budget Planner
- Car Payment Calculator
- CD Calculator
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- Compound Interest Calculator
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- Crypto Converter
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- Protein Calculator
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- Study Time Calculator
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- Word Counter
Business
17- Break-Even Calculator
- Cleaning Service Calculator
- Commission Calculator
- Construction Bid Calculator
- Consulting Rate Calculator
- E-commerce Profit Calculator
- Freelancer Tax Calculator
- Landscaping Calculator
- Legal Fee Calculator
- Markup Calculator
- Photography Pricing Calculator
- Profit Margin Calculator
- Quarterly Tax Calculator
- Restaurant Profit Calculator
- ROI Calculator
- Service Pricing Calculator
- Web Design Calculator
- Cap Rate Calculator
- Concrete Calculator
- Down Payment Calculator
- Fix and Flip Calculator
- Flooring Calculator
- Gravel Calculator
- HELOC Calculator
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- Paint Calculator
- Property Investment Calculator
- Property Tax Calculator
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- Rent vs Buy Calculator
- Rental Cash Flow Calculator
- Rental Yield Calculator
- Square Footage Calculator
- Bill Split Calculator
- Cooking Time Calculator
- Electricity Cost Calculator
- Event Budget Calculator
- Fabric Calculator
- Garden Planning Calculator
- Gift Budget Calculator
- Home Office Calculator
- Moving Cost Calculator
- Party Planning Calculator
- Pet Care Cost Calculator
- Recipe Converter
- Room Size Calculator
- Travel Cost Calculator
- Wedding Budget Calculator
- Wedding Vendor Calculator
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