Copy the link or send it to your audience.
Point your camera at the QR code to open this page on any device.
Practical calculators for DIY, renovation, energy and home budgeting.
Know exactly how many liters of paint to buy before going to the store.
Find the exact floor area of a room for flooring, paint or heating.
Compute room volume in m³ for HVAC, ventilation and heating sizing.
Never buy too few (or too many) tiles again.
Order the right number of flooring packs for your room.
Estimate concrete volume for a slab, path or footing.
Calculate cement bags and weight for any mix volume.
Know how much sand to order for your mix.
Order the right amount of gravel for your project.
Find the real surface of a pitched roof for materials.
Convert slope between percent, degrees and ratio.
Design a comfortable staircase with the right number of steps.
Turn an area into real room dimensions.
Understand your household water usage and bill.
Find out what an appliance really costs to run.
Size a solar array to cover your electricity usage.
See how much energy your solar array will produce.
Size a battery bank for your solar system.
Estimate what heating your home really costs.
Size your AC and estimate its running cost.
Practical calculators for DIY, renovation, energy and home budgeting.
Start Creating — FreeYes, all 20 home calculators are 100% free, private and run entirely in your browser. No account needed.
They use standard industry formulas. Always round up for materials and confirm with a professional for structural work.
The calculators use metric units (meters, liters, m³). Convert imperial measurements beforehand if needed.
No. Calculations happen instantly in your browser and nothing is sent to any server.
Explore the whole collection — no signup, 100% free & private.