FRENESDEIT

Free calculators for your projects and everyday life

Work out materials, compare costs and find the right dimensions. Pick up your projects without starting again.

Free · No sign-up · Five languages

My projects

Useful tools to get started

A selection for everyday building, budgeting and travel needs.

Concrete Calculator

Worked example
20 m² × 12 cm2.40 m³

Calculate concrete volume and allowance for a slab, patio or footing for free. Plan a delivery, premixed bags or cement, sand and aggregate for site mixing.

Calculate

Terrace Configurator

Worked example
5 m × 4 m20 m²

Draw your terrace and estimate boards or tiles, structure, pedestals, supplies and budget.

Configure my terrace

Tiles and adhesive

Worked example
12 m² ÷ (0.50 m × 0.50 m)48 tilesBefore waste and pack rounding

Draw the floor or wall and subtract openings. Calculate tile boxes, optional adhesive and skirting, including waste allowance and price per m².

Calculate

Loan Payment Calculator

Estimate monthly payment, interest and total loan cost from amount, rate and term.

Calculate

Cable Size Calculator

Estimate cable cross-section from current, length and allowed voltage drop. This guide does not replace an installation safety assessment.

Calculate

Car running costs: petrol, hybrid and electric comparison

Compare energy, insurance and maintenance costs using your annual distance. Free yearly and multi-year running cost estimates, excluding purchase and resale.

Calculate

Plan your terrace

Draw your space, choose your material and installation method, then work out the quantities needed for your project.

  1. Draw
  2. Configure
  3. Preview
  4. Calculate

Example: decking on pedestals

5 m × 4 m20 m²
  • Boards
  • Joists
  • Pedestals

Illustrative preview — your plan will use your own dimensions.

Configure my terraceTerrace guide
3D configurator preview: a 4 × 3 metre timber pergola
Plan a shaded garden space

3D pergola configurator

Preview your timber pergola, then prepare dimensioned plans, a timber list, lengths and a PDF document.

Preliminary design: structure, supports and anchoring still need validation.

Design my pergola

Home & energy

Understand your Linky electricity use

Import your consumption file and compare electricity tariffs. Analysis runs in your browser, with no sign-up.

An independent tool for exports from the French Linky meter.

Analyse my electricity use

Find tools for your needs

A calculation can be the start of a project

Keep your area shape, settings and different steps in My projects. Move from decking to excavation or geotextile without drawing the same area again.

  1. Save calculations and their settings.
  2. Reuse the same plan across tools.
  3. Keep track of your project steps.

Projects are saved on this device. They do not automatically sync between devices.

My projects

Example: back patio

  • Decking Calculated
  • Excavation Calculated
  • Geotextile Calculated
  • Gravel Next to plan

Practical guides — from calculation to construction

Understand the steps, avoid oversights and find the right calculator when you need it.

Browse all guides

Terrace guide

Prepare the base, choose an installation method and find tools to work out your materials.

Read guide

Tiling guide

From substrate to finishing: plan tiles, adhesive and the installation steps.

Read guide

Plasterboard partition guide

Plan a partition and estimate plasterboard, insulation and finishing materials.

Read guide

Results you can understand

  • Explained formulas

    See the calculation and units used to understand how the result is worked out.

  • Visible, adjustable assumptions

    Check your measurements, prices or allowance, then adjust the available settings.

  • Clear limitations

    Find out what still needs checking for your situation, site or chosen product.

Results remain estimates when ground conditions, products or personal circumstances need checking. Our tools explain what they calculate and what they cannot guarantee.

Our method