Outseam Measurement: How to Measure Outseam of Pants
Direct Answer: An outseam measurement is the total vertical length of pants along the outer edge, from the top edge of the waistband straight down along the outer side seam to the bottom hem. Use the formula Outseam ≈ Inseam + Front Rise − 1.5" (or Inseam ≈ Outseam − Front Rise + 1.5").
Outseam, Inseam & Rise Calculator
Calculate total outer length from inseam, or reverse-calculate inseam from outseam:
Outseam vs. Inseam vs. Rise (Visual Breakdown)
Outseam is the full exterior length from the top of the waistband down along the outer side seam to the cuff. Inseam is the inner leg seam from crotch to cuff. The vertical difference is the front rise. Tailoring note: Because the front rise seam follows the inward pelvic curve, adding Inseam + Front Rise directly along the fabric is typically 1.5" to 2.0" longer than the true straight vertical outseam.
How to Measure Outseam (3-Step Flat Method)
Button and zip a well-fitting pair of pants on a flat table, then measure along the outer seam from the top edge of the waistband to the bottom hem.
Button and zip. Smooth out wrinkles.
START: Top of waistband. Include the full waistband.
Waistband top to END: Bottom hem. Read at bottom edge.
Typical Outseam Reference Chart (Pants & Shorts)
| Garment Type | Outseam Range | Equivalent Inseam | Where It Sits |
|---|---|---|---|
| Boardshorts — Short | 16" – 18" | 5" – 7" | 2"–3" above the knee |
| Boardshorts — Standard | 19" – 20" | 8" – 9.5" | Right at the top of the knee |
| Boardshorts — Long | 21" – 22" | 10" – 11" | At or just below the kneecap |
| Adult Pants (30" Inseam) | 40" – 41" | 30" | Full length (with 10"–11" mid-rise) |
| Adult Pants (32" Inseam) | 42" – 43" | 32" | Most common US men's trouser length |
| Adult Pants (34" Inseam) | 44" – 45.5" | 34" | Tall full-length trouser |
Common Outseam Measuring Mistakes
Starting Below the Waistband
Always anchor the tape at the very top edge of the waistband—not at the seam below the belt loops. Outseam includes the full waistband height.
Assuming Same Inseam = Same Outseam
Low-rise jeans with a 32" inseam have a ~41" outseam, while high-waisted trousers with the same 32" inseam reach ~44". Always factor in the rise.
Cutting Straight Across Hip Curves
Follow the outer side seam contour along the hip down to the cuff instead of pulling the tape in a straight air-line across curved tailoring.
Measuring Pants While Wearing Them
Twisting your torso to look at the tape shifts the waistband by 1" to 2". Lay a well-fitting pair flat on a table or have a partner measure you standing straight.
Frequently Asked Questions
What is an outseam measurement?
Outseam is the full length of the outer side of the pants, measured from the top of the waistband down the side seam to the bottom of the hem. It is always longer than the inseam.
How do I measure outseam on pants, shorts or jeans?
Lay the garment flat and measure from the top of the waistband along the side seam to the bottom of the hem. On your body, measure from your natural waist (where the waistband sits) along the outside of the leg down to where you want the hem to end.
What is the outseam of a 32 inseam?
Outseam is roughly the inseam plus the front rise. With a typical rise of about 9 to 12 inches, a 32 inch inseam usually means an outseam of roughly 41 to 44 inches. Check the product's size chart for the exact figure.
What inseam should a man who is 5'10" have?
Around 31 to 32 inches for most fits, using the rule of thumb that inseam is about 45% of height. Fit style and how much break you like can move this by an inch or so.
Is a 30 inch inseam short for someone 5'9"?
A 5'9" person usually lands around 30 to 32 inches. A 30 works if you like a shorter, no-break or ankle-length look, while 32 gives a fuller break over shoes. Try the height matcher in the calculator above.
What is the difference between inseam, outseam and rise?
Inseam runs along the inner leg (see our inseam guide), outseam runs along the outer leg from the waistband, and rise is the distance from the crotch seam up to the waistband. Outseam is approximately inseam plus rise.