Kerf, Fit & Finger Joint Calculator
Turn your measured kerf into slots, holes and finger joints that actually assemble.
Use Free Tool →Pricing & Break-even Calculator
Find the number of units that covers your fixed costs — and how many you need to hit a profit target.
Monthly numbers
Everything is calculated in your browser. Nothing is uploaded.
The maths behind it
Break-even is the quantity where revenue equals total cost. With a fixed monthly cost F, a variable cost per unit V and a selling price P, the contribution per unit is P − V and the break-even quantity is F ÷ (P − V).
To reach a profit target T, the quantity becomes (F + T) ÷ (P − V).
Using it in a workshop
Fixed costs are rent, software subscriptions, insurance and salaries. Variable costs are material, packaging, shipping and payment fees. If the break-even number looks impossible, the answer is usually price — not volume.
Run the whole workshop, not just the calculator
0Machine brings projects, quotes, materials, production and time tracking into one place.