Blind Size Calculator

Your details

Inside mount: blind fits inside the window frame for a recessed look. Outside mount: blind is installed on the wall or trim above and around the window.
Measure the width at the top of the window opening (inside edge to inside edge for inside mount, or frame edge to frame edge for outside mount).
in
Measure the width at the middle of the window opening.
in
Measure the width at the bottom of the window opening.
in
Measure the height from the top to the bottom of the window opening on the left side.
in
Measure the height at the center of the window opening.
in
Measure the height on the right side of the window opening.
in
For inside mounts: subtract 1/4 inch (6 mm) from the final height so the blind does not rub against the window sill.
Blind widthStandard sizing range
35.875in

Order this width from the manufacturer

Blind height (drop)48.125in
Window opening width (smallest)35.875in
Window opening height (longest)48.125in
Mount type appliedInside mount
Width adjustment applied0in
Height adjustment applied0in

Order your blind at 35.875 in wide x 48.125 in tall.

  • Order a blind that is 35.875 in wide by 48.125 in tall (width x height).
  • For inside mounts, the narrowest width across your three readings is used - windows are rarely perfectly square, so always measure at top, middle, and bottom.
  • No sill deduction was applied. If the blind will sit near the sill, consider enabling the 1/4-inch deduction to prevent rubbing.
  • Always double-check by measuring twice. Submit your exact calculated dimensions to the manufacturer without rounding up or down.

Next stepWrite measurements as Width x Height (W x H) when ordering. Most manufacturers deduct a small amount from inside-mount widths automatically - confirm this with your supplier before ordering.

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