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Category 04 of 12 · Age, tips and engines

Daily Life Calculators

Daily life calculators answer the practical questions that come up at home, in the garage and when you go out: how much fabric to buy, what size curtains you need, what a cleaner should cost, how a new set of wheels will fit, your exact age to the day and how much to tip.

Each tool explains its formula and gives a worked example, so you can check the answer yourself.

10live calculators
5topics
Freeno sign-up
Diner paying a restaurant bill by phone at a card reader

01Car and driving

Engine, tyre and wheel maths for car owners and builders. · 3 live

Live

Compression Ratio Calculator

Calculate static engine compression ratio from bore, stroke, chamber, piston, gasket and deck volumes.

Live

RPM Calculator

Calculate engine RPM from vehicle speed, tire diameter, gear ratio and final drive.

Live

Wheel Offset Calculator

Compare wheel offset and width to see changes in backspacing, inner clearance and poke.

02Wind and flying

Split wind into headwind and crosswind components. · 1 live

03Home

Plan home costs and furnishings. · 2 live

Live

Curtain Size Calculator

Work out the curtain width and length you need from your window and rod, choose fullness by heading style.

04Sewing and crafts

Buy the right amount of fabric and cut patterns accurately. · 2 live

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Fabric Calculator

Work out how much fabric to buy for any project.

Live

Circle Skirt Calculator

Get the waist radius and fabric length for full, 3/4, half, quarter and double circle skirts.

05Dates and money

Exact ages and fair tips. · 2 live

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Tip Calculator

Work out the tip, total and each person’s share in seconds.

Quick guide

Which calculator do I need?

Match what you’re trying to do with the right tool.

If you’re…Changing wheels or tyres
UseWheel Offset Calculator, then RPM Calculator for engine speed
If you’re…Building or tuning an engine
UseCompression Ratio Calculator
If you’re…Pilots and cyclists checking wind
UseCrosswind Calculator
If you’re…Sewing a garment or cushions
UseFabric Calculator (circle skirts have their own tool)
If you’re…Dressing a window
UseCurtain Size Calculator
If you’re…School forms or exact age
UseChronological Age Calculator

How we build and check these calculators

Every calculator on Tuff Search shows the formula or method it uses, a worked example and its limits, and lists its sources where facts matter. Health, money and legal-rule pages are checked against official or peer-reviewed sources and dated. Read how we build and review calculators in our Editorial Policy.

FAQ

Frequently asked questions

Short answers about the daily life calculators.

Need a calculator we don’t have?

We add new calculators regularly. Email suggestions@tuffsearch.com with the calculation you need.

New calculator ideassuggestions@tuffsearch.com

Yes. All Tuff Search calculators are free and need no account.

Yes. Engine and wheel tools accept millimetres and inches, and speed tools accept mph and km/h.

It is a planning estimate based on published national price ranges and your inputs. Local prices vary, so get quotes from cleaners in your area.

Yes. The Chronological Age Calculator works to any past or future reference date, which helps with school and eligibility cut-offs.

Yes. Suggest one through our Contact Us page.

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