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Regular polygon frame finish.

Use the supplied regular polygon geometry and the specified uniform inset.

Read the right quantitative data

Selected coats and liquid coverage.

Check this ordering assumption

Subtracting a side-length allowance does not directly produce a uniform normal-width inset.

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The face model assumes the explicitly regular, centred geometry.

A worked quantity method

This illustrative set of supplied inputs demonstrates Regular Polygon Inset Frame Coating Calculator. Replace the example measurements and product figures with your own before ordering.

Supplied inputMetric displayUS display
Supplied coat count1 1
Chosen product coverage1 m²/L40.75 ft²/US gal
Selected container volume1 L0.26 US gal
Supplied regular polygon frame 1: Supplied polygon side count4 4
Supplied regular polygon frame 1: Measured outer apothem0.5 m1.64 ft
Supplied regular polygon frame 1: Supplied uniform face inset0.1 m0.33 ft
Supplied regular polygon frame 1: Identical frames1 1
Frame face area = side count × tan(π/side count) × (outer apothem² − inner apothem²); inner apothem = outer apothem − supplied inset.Frame face area = side count × tan(π/side count) × (outer apothem² − inner apothem²); inner apothem = outer apothem − supplied inset. Does not choose frame thickness, strength, joinery or finish specifications.

Selected coating containers: 1 containers

Measured coated area
0.36 m²
Required liquid
0.36 L

Regular polygon with parallel inset edges. An irregular polygon requires an actual boundary measurement instead. Coating suitability and coat count are not selected.

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BEFORE YOU CALCULATE

Your measurement and product-data sheet

Record what you know and mark verified items ready. Notes save on this browser after you edit them. Download a copy before clearing browser data.

Use the supplied regular polygon geometry and the specified uniform inset.

Selected coats and liquid coverage.

Subtracting a side-length allowance does not directly produce a uniform normal-width inset.

Input for Regular Polygon Inset Frame Coating Calculator. Record the value with its unit and quantity basis.

Input for Regular Polygon Inset Frame Coating Calculator. Record the value with its unit and quantity basis.

Input for Regular Polygon Inset Frame Coating Calculator. Record the value with its unit and quantity basis.

Input for Regular Polygon Inset Frame Coating Calculator. Record the value with its unit and quantity basis.

Input for Regular Polygon Inset Frame Coating Calculator. Record the value with its unit and quantity basis.

Input for Regular Polygon Inset Frame Coating Calculator. Record the value with its unit and quantity basis.

Input for Regular Polygon Inset Frame Coating Calculator. Record the value with its unit and quantity basis.

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Turn the estimate into an order

  1. Confirm that all quantities use the same measured basis and the selected product's current data.
  2. Keep different products, finishes and handed variants in separate purchase lines.
  3. Review exact demand and whole-pack purchase quantities before entering your quoted prices.
  4. Record compatible stock already on hand, then save the remaining order in your browser project.

Measurement and purchase guides

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Reviewed 6 October 2026. Geometry and purchase arithmetic use your measurements and selected specifications. Calculation scope.

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