Spend smarter
Free online calculators
Quick calculators for everyday money decisions, travel planning, shopping, and useful conversions. Each tool is built to give a clear answer without signup or clutter.
Estimate the numbers here, then track the real spending in Spendspace.
Finance
Tip
Use this tip calculator to split restaurant bills, choose a fair tip percentage, round totals, and see each share clearly before you pay at the table.
Percentage
Use this percentage calculator to solve percent-of, percent-change, and what-percent questions with clear steps for bills, discounts, and budgets.
VAT
Use this VAT calculator to add or remove tax from any amount and instantly see the net price, VAT amount, and gross total for invoices or receipts.
Loan
Use this loan calculator to estimate monthly payments, total interest, repayment cost, and an amortization schedule before you borrow with confidence.
Savings
Use this compound interest calculator to project savings growth, monthly deposits, interest earned, and after-tax balance for your plan over time.
Take-home pay
Use this take-home pay calculator to estimate net salary after US federal or UK income tax, National Insurance, and payroll deductions for 2025.
Mortgage
Use this mortgage calculator to estimate monthly principal, interest, tax, insurance, and PMI payments with an amortization schedule for any home loan.
Debt payoff
Use this debt payoff calculator to compare snowball and avalanche strategies, find your payoff date, and see how much interest each method saves.
Shopping
Discount
Use this discount calculator to find sale prices, savings, and optional VAT in seconds so you can compare checkout totals before buying online.
Price per unit
Use this price per unit calculator to compare products by quantity, spot the best value, and avoid misleading package sizes while shopping for deals.
Conversion
Currency
Use this currency converter to check indicative exchange rates, convert major currencies, and plan travel spending before exchanging money abroad.
Unit converter
Use this unit converter for quick length, weight, temperature, volume, and speed conversions when recipes, travel, or projects need clarity.
Time
World clock
Use this world clock to compare current times, dates, and UTC offsets across major cities before calls, trips, and remote work plans across teams.
Age
Use this age calculator to find exact years, months, days, total weeks, and total days between dates for forms, milestones, or planning needs.
Countdown
Use this countdown timer to track days until an event, count elapsed days, and keep deadlines, trips, or celebrations easy to follow every day.
Automotive
Fuel cost
Use this fuel cost calculator to estimate trip fuel, driving cost, and petrol or gas spend from distance and efficiency before a road trip or commute.
Fuel efficiency
Use this fuel efficiency calculator to convert distance and fuel used into MPG, km/L, and L/100km for clearer driving cost estimates and budgeting.
Road trip cost
Use this road trip cost calculator to estimate fuel, lodging, food, and other travel costs for any journey — with per-person sharing for groups.
Health
BMI
Use this BMI calculator to find your body mass index, weight category, and estimated basal metabolic rate using the Mifflin-St Jeor formula.
Ovulation
Use this ovulation calculator to estimate your next period date, ovulation day, fertile window, and three upcoming cycles from your last period and cycle length.
Running pace
Use this running pace calculator to find your running pace, finish time, or distance from any two inputs — with presets for 5K, 10K, half-marathon, and marathon.
Budgeting
Split expenses
Use this split expenses calculator to divide group costs fairly, track who paid what, and generate a minimum-transaction settlement plan for trips, dinners, and shared bills.
Subscriptions
Use this subscription cost calculator to add all your recurring services, see monthly and annual totals, and find which subscriptions to switch to annual billing.
Turn quick estimates into clean spending records
Spendspace helps you log purchases, split shared costs, and keep budgets current after the calculator has done the math.
Download on the App Store