Calculate Your Own 3D Printing Costs: A Practical Guide

If you want to buy a finished 3D print, use the Hark Tech file uploader for a firm price before checkout. The UK print-cost guide explains the buying route, minimums and delivery.

This guide is for people costing work on their own printer. Your production cost is not the same thing as a workshop's selling price.

Start with the sliced file

Slice the actual model using the printer, material and settings you intend to use. Record the estimated filament weight and print time, including supports and any colour-change waste. Estimates depend on the profile and should be compared with your completed prints over time.

Add the costs you actually incur

• Filament: multiply the used grams by the cost per gram of the spool. Include support and purge material.
• Electricity: use measured energy consumption where possible, multiplied by your electricity unit rate. A printer's maximum rated power is not its average consumption.
• Maintenance and equipment: allow for consumables, repairs and the useful working life of the machine.
• Failed prints: include the material, machine time and work lost to failed attempts.
• Your time: preparation, slicing, loading, support removal, checking and packing still take time even when the printer runs unattended.
• Selling and fulfilment: packaging, delivery, payment fees and other business overheads matter when you are supplying a customer.

A spreadsheet can keep these inputs visible. A calculator can help too, provided you understand its assumptions and replace defaults with your own measurements.

A simple material calculation

For a spool that costs £20 per kilogram, the material cost is 2p per gram. A sliced job using 50 g therefore consumes £1 of filament before energy, equipment, labour or delivery. This is a worked arithmetic example, not a Hark Tech quote or a current filament price recommendation.

Keep cost and selling price in separate columns. A sustainable selling price must cover the work and overheads as well as plastic, and allow for the risk of rework. Simply copying another workshop's headline rate will not tell you whether your own job is viable.

Compare estimates with completed jobs

Record the actual run time, material use, failures and hands-on work for a few representative parts. Use those results to improve your estimates. Different geometry, materials and quality settings can produce very different costs even when two models have similar dimensions.

For a batch, account for the actual production arrangement and shared packing work. Do not assume ten copies take exactly ten times the total effort of one copy, or that every saving comes from less filament.

When you want a supplier price

A supplier quote includes that supplier's equipment, process, handling and commercial terms. Compare the same file and specification, and check the final delivered total.

Hark Tech prints supplied files in the UK. Upload an STL, STEP or 3MF to see the price for your selected material and quantity, or use the current rate card to understand the workshop's published pricing rules.