Trimmed paper size calculator
The trimmed paper size calculator gives the finished size of a sheet after a chosen amount is trimmed from each edge.
Result and working notes
Use 100% print scaling for this record. The sketch is not life-size and must not be used as a cutting pattern. Check measurements against the real materials.
Width after trimming: 20 cm
A trim that removes the full width or height is rejected. Measure the printed content before cutting.
| Width after trimming | 20 cm |
| Height after trimming | 28.7 cm |
| Paper area retained | 574 cm² |
| Paper area removed | 49.7 cm² |
Free to use. A free account saves, downloads and prints your results, with no card.
Subtract left and right trims from width, and top and bottom trims from height; report the removed area separately. Adjust the numbers and check the live result before printing your measurement notes.
Last reviewed 3 October 2026.
Work out your display
- Measure the board, paper or existing item. Choose a single unit that matches the fields.
- Set width (cm), height (cm), trim from left (cm), trim from right (cm), trim from top (cm), trim from bottom (cm).
- Compare the live totals with the stated assumptions. Use a free account to download or print the measurement sheet.
How the estimate is calculated
Subtract left and right trims from width, and top and bottom trims from height; report the removed area separately. A trim that removes the full width or height is rejected. Measure the printed content before cutting.
This utility supports the measuring and preparation work around a display. It provides plain quantities and dimension notes; custom lettering, bunting artwork, decorations and finished themed packs belong in the display maker.
Every result comes from the values you enter, with no model request or invented price.
Practical questions
How does trimmed paper size calculator work?
Subtract left and right trims from width, and top and bottom trims from height; report the removed area separately.
What should I check before using the result?
A trim that removes the full width or height is rejected. Measure the printed content before cutting. Start with measured values for width (cm), height (cm), trim from left (cm), trim from right (cm), trim from top (cm), trim from bottom (cm).
Is this display preparation tool free?
Yes. You can calculate and preview without signing in. Saving, downloading and printing need a free account, with no card.
Will this produce a finished display pack?
No. It prints calculation notes for trimmed paper size calculator, rather than a design template or decorative artwork. When you want a finished board, lettering, bunting or decorations, the WallKiwi display maker designs them for you.
Tools for the next step
- Measuring and print estimatesUsable display board areaFind the working space left inside a board after reserving an equal edge on every side. Free in your browser, with printable notes you can save.
- Measuring and print estimatesDisplay border roll estimatorWork out how many rolls of edging you need for a rectangular board. Free in your browser, with printable notes you can save.
- Measuring and print estimatesBacking paper roll calculatorEstimate vertical strips and roll length for covering a board with backing paper. Free in your browser, with printable notes you can save.
- Measuring and print estimatesBacking sheet coverage calculatorCount rectangular paper sheets needed to cover a display surface in a regular grid. Free in your browser, with printable notes you can save.
Cite this tool
APA 7
WallKiwi. (2026, October 3). Trimmed paper size calculator. https://wallkiwi.com/tools/trimmed-paper-size-calculator
Harvard
WallKiwi (2026) Trimmed paper size calculator. Available at: https://wallkiwi.com/tools/trimmed-paper-size-calculator.
Ready to make your display?
Describe your display in a sentence and WallKiwi designs the board, lettering, bunting and cut-outs to match, ready to print on A4. Designs use credits, and a free account includes some each month.