20 free calculators · No signup · Formulas shown
Calculate smarter.
Know exactly what you need.
Simple, practical calculators for everyday decisions.
- Calculators
- 20
- Categories
- 6
- Cost
- Free
Popular calculators
The tools people reach for first.
Energy
Electricity Cost Calculator
What does an appliance cost to run?
Open calculatorTransport
Fuel Cost Calculator
How much fuel — and money — for a trip?
Open calculatorHome & Garden
Paint Calculator
How many litres or gallons for your walls?
Open calculatorHome & Garden
Tile Calculator
How many tiles — plus wastage — for the area?
Open calculatorHome & Garden
Concrete Calculator
How much concrete for a slab or footing?
Open calculatorEnergy
PC Electricity Cost Calculator
What does your gaming or desktop PC cost to run?
Open calculatorBrowse by category
Six areas, one approach: enter a few numbers, get an honest estimate.
Recently added
Fresh tools, same honest math.
Energy
AC Electricity Cost Calculator
What does cooling cost per season?
Open calculatorTransport
Commute Cost Calculator
What does getting to work cost each month?
Open calculatorHome & Garden
Concrete Calculator
How much concrete for a slab or footing?
Open calculatorTransport
Cost Per Km Calculator
True per-kilometre cost of your car.
Open calculatorMost-used right now
Everyday essentials for money, travel and energy.
Money
Tip Calculator
How much tip — and total — for any bill?
Open calculatorMoney
Discount Calculator
Sale price after percent off?
Open calculatorTransport
Trip Cost Calculator
Split driving costs fairly.
Open calculatorTransport
EV Charging Cost Calculator
What does a full charge really cost?
Open calculatorExplore all calculators
All 20 tools, grouped by category.
Home & Garden · 5
Home & Garden
Concrete Calculator
How much concrete for a slab or footing?
Open calculatorHome & Garden
Gravel Calculator
How much gravel for a driveway or bed?
Open calculatorHome & Garden
Mulch Calculator
How much mulch at your chosen depth?
Open calculatorHome & Garden
Paint Calculator
How many litres or gallons for your walls?
Open calculatorHome & Garden
Tile Calculator
How many tiles — plus wastage — for the area?
Open calculatorEnergy · 3
Transport · 5
Transport
Commute Cost Calculator
What does getting to work cost each month?
Open calculatorTransport
Cost Per Km Calculator
True per-kilometre cost of your car.
Open calculatorTransport
EV Charging Cost Calculator
What does a full charge really cost?
Open calculatorTransport
Fuel Cost Calculator
How much fuel — and money — for a trip?
Open calculatorTransport
Trip Cost Calculator
Split driving costs fairly.
Open calculatorMoney · 4
Money
Cost Per Use Calculator
Is it cheaper per wear, wash, or ride?
Open calculatorMoney
Discount Calculator
Sale price after percent off?
Open calculatorMoney
Subscription Cost Calculator
What do subscriptions really cost per year?
Open calculatorMoney
Tip Calculator
How much tip — and total — for any bill?
Open calculatorHow HowMuchTool works
Discover → Choose → Calculate → Understand → Act.
Discover
Search or browse by category — fuel for a trip, paint for a room, tip for dinner.
Calculate
Type the numbers you know. Labels, units and sensible defaults guide you.
Understand & act
Get an instant estimate with formula and assumptions — then copy, print or reset.
Why trust the numbers?
No hype — just how the site works.
Free to use
Every calculator is free, with no locked features and no account walls.
No signup required
No accounts, no email capture. Open a page and calculate.
Fast calculations
Static pages with tiny scripts — answers update as you type.
Transparent formulas
Each result shows its formula, inputs, and assumptions.