Compound interest
See how your money can grow over time.
A little clarity goes a long way
Find your answer.
Free calculators for life’s big and small decisions. From your next home to your everyday numbers.
Your everyday toolkit
View all calculatorsStart with a calculator.
BMI
Check your body mass index and its reference range.
Percentage
Calculate percentages, changes, and what-if scenarios.
Age
Find an exact age in years, months, and days.
Finance in focus
Plan your next move.
Run the numbers. Explore your options. Make more confident decisions.
A tool for every part of life
What’s on your mind?
Explore the whole collection, one category at a time.
Finance
Plan, save, and make more informed money decisions.
Explore financeHealth
Understand your health and everyday wellness goals.
Explore healthMath
Work through the numbers, one clear step at a time.
Explore mathSpin wheels
Pick a name, settle a choice, or find your next idea with a spin.
Explore spin wheelsTime & clocks
Live world clocks, local dates, and a little more time for what matters.
Explore time & clocksSpin wheels
Explore spin wheelsLeave a little to chance.
Pick a name, settle a choice, or find your next idea with a spin.
Time & clocks
Explore time toolsMake time work for you.
Plan a call, check a date, or focus on what comes next.
World Clock
See the time now, compare cities, and keep your favorite clocks together.
All Time Zones
Find a time zone by city, country, region, or IANA name.
Online Timer
Set a countdown for focus, cooking, study, or your next break.
Online Stopwatch
Measure elapsed time and record laps with a simple online stopwatch.
Start with a goal
What are you planning next?
A few connected tools can help you see the whole picture.
Plan for a home
Start with a budget, estimate a payment, then compare renting and buying.
Get your money organized
Map your monthly budget, explore a debt payoff plan, and make room for savings.
Explore your fitness numbers
Explore daily energy estimates, body measurements, and the pace of your next run.
Financial calculators
All financial calculatorsGive your money a plan.
Plan, save, and make more informed money decisions.
Small deposits. A longer view.
Explore how your starting balance, regular contributions, time, and an assumed return work together.
Compound Interest CalculatorLoan CalculatorCompare fixed loan payments, deferred balances and zero-coupon borrowing, with separate payment and compounding frequency options.Savings CalculatorEstimate savings growth from an opening balance and regular deposits, including contribution timing, tax and inflation scenarios.Retirement CalculatorModel retirement savings, salary-based contributions and inflation-linked spending, with a year-by-year withdrawal scenario.
Health & fitness calculators
Understand the numbers behind your routine.
Explore energy needs, body measurements, and exercise estimates with the assumptions in view.
BMR CalculatorEstimate adult resting energy expenditure using the available equations, and convert food energy between kilocalories and kilojoules.Calorie CalculatorEstimate adult daily maintenance calories from body measurements and activity assumptions, with food-energy unit conversion.Pace CalculatorCalculate pace, speed, time and distance, review cumulative splits, or project a finish from the average pace so far.
Math meets everyday life
Small questions. Useful answers.
For the numbers that turn up in your day, keep the right tools close.
Percentages & fractions
Check a change, simplify a fraction, or work through a proportion.
Dates & time
Count days, shift a date, or add up hours and minutes.
Units & measurements
Convert between units and work out the area of a space.
Bills & projects
Split a restaurant bill or estimate materials for your next project.
How it works
From a question to a clearer next step.
Find your tool
Search for a calculator or browse by the question you want to answer.
Make it your scenario
Enter your values and select Calculate to see the result and its breakdown.
Look beyond the result
Check units and assumptions before using a result.
Look beyond the result
The same percentage can tell two different stories
An increase and a decrease of the same percentage do not cancel out: the second percentage uses a different starting value. Move the slider to see why.
100 × (1 + 20/100) × (1 − 20/100) = 96
| Starting value | |
|---|---|
| After the increase | |
| After the decrease |
Clarity comes from contextUnderstand the number.
Understand the number.
Then make your move.
A useful answer comes with an explanation. Finflo helps you see what goes into a calculation and what the result means.
Our approach to accuracySee how the answer is worked out.
Read the formula, follow a worked example, and check the assumptions behind your result.
Make room for “what if?”
Change a rate, a date, or an amount. Explore different scenarios before deciding what comes next.
Get straight to the useful part.
Open a calculator and start. There’s no account to create or subscription to unlock.
My workspace
Keep your next decision in one place.
Your favorite tools, saved calculations, and scenarios in one place.
Open my workspaceSaved only in this browser. Clear site data and your saved items will be removed. Export a backup to keep a copy or move your workspace to another device.
Keep your go-to tools close.
Select the star on any calculator to find it here.
Give your next calculation a name.
Run a calculator, name the result, and choose Save calculation. It will be waiting here when you return.
Compare scenarios
Compare up to three saved results from the same calculator, mode, and currency. Differences are measured against the first scenario.
Guides
Explore all guidesA little knowledge goes further.
Practical guides to the ideas behind the numbers.
Finance
What your mortgage payment actually includes
Understand principal, interest, ownership costs, and why a loan payment is different from a full housing budget.
Read the guideFinance
Compounding, contributions, and the time between them
Learn how rates, contribution timing, inflation, and taxes change a savings projection.
Read the guideHealth & fitness
What adult BMI can and cannot tell you
Understand adult BMI, its units, and the limits of a population-level screening measure.
Read the guideAre the calculators free to use?
Yes. Finflo’s available calculators are free to use, with no account or subscription required.
Can I use Finflo outside the United States?
Yes. Many tools support metric and US customary units. Currency, tax rules, and financial assumptions vary by calculator, so check the units and region shown on the tool you use.
How do I understand or check a result?
Calculator pages include formulas, assumptions, worked examples, and relevant source references. Check that your inputs and selected units match the scenario you want to explore.
Can I save or share my results?
Save named calculations in My workspace to reopen or compare them on this device. Most calculators also offer CSV, PDF, and printing. Copy tool link shares the page address without your inputs.
The calculator library
Your next answer is a calculation away.
Free calculators for money, health, math, and everyday life. Change a rate, a date, or an amount to explore different scenarios.
Browse all calculators- Always free
- No account needed
- Formulas explained
Finance
Plan, save, and make more informed money decisions.
Health & fitness
Understand your health and everyday wellness goals.
Math
Work through the numbers, one clear step at a time.
Everyday
Useful tools for life's little questions and big projects.
Spin wheels
Pick a name, settle a choice, or find your next idea with a spin.
Time & clocks
Live world clocks, local dates, and a little more time for what matters.