Is this DIY cost calculator free to use?

Yes, the calculator is free with no signup required. It runs entirely in your browser.

What can I use this cost calculator for?

It's built for hydroponics systems, soap and candle making, woodworking, and general DIY projects, but works for any project where you want to total up materials, labor, and overhead costs.

Does it calculate cost per unit for batches?

Yes. Enter your batch yield (e.g. number of soap bars produced) and the calculator divides the total project cost to show cost per unit.

DIY Project Cost Calculator

Estimate the true cost of your next hydroponics build, soap batch, or woodworking project. Add your materials, labor time, and overhead to see a total cost and cost-per-unit — useful for pricing what you sell or just knowing what a project really costs before you start.

Cost Estimator

The Build Ledger

Disclosure: This tool contains Amazon affiliate links. As an Amazon Associate I earn from qualifying purchases at no extra cost to you.

Saved Projects:

Materials & Supplies

Quick-add prices are typical estimates, not live prices – click “Buy on Amazon” to check today’s actual price, and edit any cost field directly if it’s changed.

No.DescriptionQtyUnitUnit CostLine Total

Labor – hours spent

Labor – rate you’d pay yourself ($/hr)

Overhead / misc (%)

Batch yield (units produced)

Summary

Materials subtotal$0.00

Labor cost$0.00

Overhead$0.00

Grand Total $0.00

Cost per unit: $0.00

Dee

Dee Valentin is a cybersecurity professional turned author and creator, formerly based in Arizona and now living in Central Michigan. With a background in information security and technology innovation, Dee writes approachable guides that help readers use AI and automation to make work and life more efficient. Outside the digital world, Dee is an avid gardener with a special focus on hydroponics and sustainable growing systems. Whether experimenting with new plant setups or sharing tips for soil‑free harvests, Dee blends technology and nature to inspire others to live more creatively and sustainably.

See Full Bio