Sums like a human.
Everyday calculators that work the way you'd jot it down — quick, plain, and nothing leaves your browser. No sign-up. No tracking. No nonsense.
The tools
one page each, all free, nothing storedMoney & Tax
Percentage
Of, what-percent, change.
MoneyMortgage
Repayments & LTV.
MoneyLoan
Repayments & interest.
MoneyVAT
Add it on or strip it out.
MoneyCompound interest
Savings, snowballing.
MoneyDiscount
Sale price & savings.
MoneyTip
Split between the table.
MoneyStamp Duty
SDLT, England & NI.
MoneyPension
Project your pot.
MoneySavings goal
Time to reach it.
MoneyInflation
Money over time.
MoneyCurrency
Live exchange rates.
MoneyHealth & Body
BMI
Metric or imperial.
HealthDue date
Weeks & due date.
HealthCalorie
TDEE & daily target.
HealthMacros
Protein, carbs, fat.
HealthBody fat
US Navy method.
HealthIdeal weight
Healthy range.
HealthEveryday & Time
Units
Length, weight, temp.
EverydayDates
Days between, add time.
EverydayTime
Add, subtract, duration.
EverydayHours
Worked time & pay.
EverydayCooking
Cups to grams & back.
EverydayAge
Down to the minute.
EverydayFuel cost
Cost of a journey.
EverydayRunning pace
Pace & speed.
EverydayMaths
Numbers, not data.
Every sum happens in your browser and stays there. Close the tab, it's gone.
No sign-up wall between you and a quick answer. It's a calculator, not a relationship.
Clearly-marked ads keep it free. They never touch your numbers.
KwikSum is a free collection of online calculators for everyday life. Each tool is its own page for fast, focused results — salary, percentage, bill split, tip, loan, VAT, compound interest, discount, unit converter, date, BMI, cooking converter, and age calculator. No sign-up, instant results, works on any device, and nothing you type ever leaves your browser.