About Planumera
Why this independent construction calculator site exists and who it is built for.
Useful numbers before the first purchase
Planumera is an independent collection of construction calculators and measurement guides for homeowners, tradespeople and anyone planning a real job. The aim is simple: turn site dimensions into quantities that are easy to understand and check.
What we publish
Each tool shows its inputs, units and assumptions. Supporting guides explain where product data comes from and which details still need a site check. Planumera does not sell materials and does not replace drawings, local rules or qualified professional advice.
Project sheet
Open a tool, enter your measured dimensions, then save an estimate. Keep another version if you want to compare products or allowances.
The project sheet stays on this device. Clearing browser data removes it.