Free DIY Calculators
Instant, accurate calculators for home improvement projects. No account needed. Everything runs in your browser.
Tile Calculators
Shower Tile Calculator
Calculate exactly how much tile you need for shower walls and floor.
Use calculator →Bathroom Wall Tile Calculator
Estimate tile needed for bathroom walls with waste factor included.
Use calculator →Grout Calculator
Find out how many bags of grout you need for any tile project.
Use calculator →Flooring Calculators
Laminate Flooring Calculator
Calculate boxes of laminate flooring needed including waste.
Use calculator →Hardwood Flooring Calculator
Estimate hardwood flooring by box coverage with waste factor.
Use calculator →Underlayment Calculator
Calculate how many rolls of underlayment your floor project needs.
Use calculator →Carpet Calculator
Estimate carpet and padding in square yards for any room.
Use calculator →Lighting Calculators
Recessed Lighting Calculator — Garage
How many recessed lights do you need for your garage?
Use calculator →Recessed Lighting Calculator — Bedroom
Calculate the perfect number of can lights for a bedroom.
Use calculator →Lumens Calculator
Find out how many lumens you need for any room size.
Use calculator →About These Calculators
Every calculator on CalcForDIY runs entirely in your browser. Nothing is uploaded to a server. No account needed. Results are instant.
All formulas are sourced from industry standards — the Tile Council of North America for tile waste factors, the National Wood Flooring Association for hardwood and laminate, and manufacturer technical documentation from Mapei and LATICRETE for grout calculations.
Whether you are a first-time DIYer or a contractor running quick estimates on a job site, these tools are built to give you accurate numbers fast.