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Quick answer — blind size for your opening
36×60 in opening, inside mount: order about 35.6 in × 60.0 in (width after ≈0.375 in deduction). Minimum recess depth ≈ 2.3 in. Outside mount on 40×58 in with 2 in overlap per side → 44.0 in × 60.0 in.
Free window blind size calculator for inside mount and outside mount width, height, overlap, and depth before you order custom blinds. More layout tools on our Size & Spacing hub.
Last updated October 9, 2026
Planning tool only—not a substitute for manufacturer measuring guides or professional installation quotes.
Comparing with curtains?Try Curtain Size Calculator
Recommended Blind Size
35.6 x 60.0 in
Estimated Stack Height
7.2 in
Minimum Mount Depth
2.3 in
Fit Note
Inside mount gives a clean built-in look but requires enough frame depth.
Installation Tips
Reference scenarios from the same formulas as the calculator. Deductions and overlap are planning defaults—confirm with your blind supplier.
| Scenario | Opening | Mount | Blind W × H | Min depth |
|---|---|---|---|---|
| Default — 36×60 in inside mount | 36×60 in | Inside | 35.6 in × 60.0 in | 2.3 in |
| Outside mount — 40×58 in, 2 in overlap/side | 40×58 in | Outside (2 in/side) | 44.0 in × 60.0 in | 1.0 in |
| Wide window — 72×48 in inside | 72×48 in | Inside | 71.6 in × 48.0 in | 2.3 in |
| Bath — 24×36 in inside | 24×36 in | Inside | 23.6 in × 36.0 in | 2.3 in |
| Metric — 91.4×152.4 cm inside (~36×60 in) | 91.4×152.4 cm | Inside | 90.4 cm × 152.4 cm | 5.7 cm |
Inside mounts look minimal; outside mounts usually improve privacy and blackout when overlap is generous.
Check frame depth, headrail projection, and handle clearance before ordering blinds that must mount flush inside the frame.
For a 36 × 60 in window with inside mount (default demo):
Blind width
35.6 in
Blind height
60.0 in
Min depth
2.3 in
The calculator converts your window measurements into mount-specific blind sizes. Inside mount applies a standard width deduction so the product clears the frame; outside mount adds overlap for better coverage and light management. Stack height is estimated at about 12% of blind height (minimum 4 in) for planning headroom when blinds are fully raised.
Inside width = opening width − 0.375 inOutside width = opening width + (2 × side overlap)Outside height = opening height + bottom overlapShare it with anyone measuring windows for new blinds.
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