Pattern and waistband agree
The entered waist plus 2 cm waist ease gives a 78.0 cm target. The joined pattern waist is 78.0 cm with a 0.0 mm difference, and the waistband differs from that joined seam by 0.0 mm.
Basic pants pattern
Create a basic pants pattern from your measurements
Generate a free printable pants block from your waist, hips, rise, outseam, inseam, knee, and hem measurements. Choose regular, relaxed, or wide-leg proportions and download the custom front, back, and waistband as A4 PDF, copyshop PDF, or SVG.
Calculated draft
This pants pattern is a calculated base draft based on the measurements and settings you enter.
Always sew a test garment, check crotch depth, seat fit, waist position, and leg balance before cutting final fabric.
Pants draft preview
Real generated example
From body measurements to matched pants pieces
Three calculated piecesThis regular pants example is generated by the same drafting code as the download. A 76 cm waist, 100 cm hips, leg lengths, rise, knee, hem, and ease produce separate front and back legs plus a matching straight waistband—not a stock pattern image.
Measurements used
- Waist
- 76 cm
- Hips
- 100 cm
- Outseam
- 104 cm
- Inseam
- 78 cm
- Rise
- 26 cm
- Knee circumference
- 44 cm
- Hem circumference
- 40 cm
- Hip ease
- 4 cm
All three pieces come from one calculation. The generator checks the joined waist, waistband, side seams, and inseams numerically, while the different front and back crotch curves preserve the shaping required for each side of the body.
Generate your pants pattern
Replace these sample values with your measurements, then verify the 5.0 × 5.0 cm test square and sew a fitting sample before cutting final fabric.
Construction checks from this draft
Front and back sew together
The generated front side seam is 104.1 cm and the back is 104.1 cm. Their calculated difference is only 0.01 mm, inside the generator’s 3 mm construction tolerance.
Equal inseams, shaped crotch curves
The front and back inseams have a 0.0 mm difference. The crotch curves are intentionally different—29.3 cm at the front and 30.3 cm at the back—to create separate front and seat shaping.
What is included in each export
Tiled A4 PDF
Full-size front, back, and waistband pages ready to print at 100%, trim, and assemble at home.
Full-size PDF
All three pieces on a large-format sheet with seam and hem allowances, grainlines, and construction guides.
SVG export
Editable vector pieces for plotting, technical adjustments, or checking exact dimensions before printing.
Related guides
Measurements
Pants measurements
Understand waist, hip, rise, inseam, outseam, knee, hem, darts, and ease before generating a pants block.
PiecesPants pieces explained
Review front, back, waistband, crotch curve, inseam, outseam, darts, grainline, and hem fold.
ConstructionSeam and hem allowances
Read solid seam lines, dashed cutting lines, construction seam allowance, hem allowance, curves, and corners.
Pattern details
Front, back, waistband, and guides
The pants draft includes separate front and back pieces, a waistband, grainlines, hip/crotch guides, and hem fold.
Crotch, inseam, outseam, waist
The main sewing relationships are inseam to inseam, side seam to side seam, and waistband to waistline.
Waist, hips, rise, inseam, outseam
Rise and crotch shape control sitting comfort; inseam and outseam control leg balance.
Seam matching and hem allowance
Check front/back crotch curves, inseams, side seams, effective waistline, waistband length, and 3 cm hem allowance.
Pants pattern guide
A printable pants block calculated from your measurements
The generator drafts coordinated front, back, and waistband pieces from one set of body and length measurements. Use these notes to choose a silhouette, check the crotch and leg balance, and print the pattern accurately.
Front, back and straight waistband
The download contains separate front and back leg pieces, a straight waistband, waist darts when selected, seam and hem allowances, grainlines, knee and hip guides, and a 5 × 5 cm print test square.
Waist, hips, rise and leg lengths
Waist and hips control the upper block; rise and inseam establish the crotch level and leg length. Knee and hem circumferences determine the finished leg shape.
Regular, relaxed or wide-leg
Presets provide practical ease and leg-width starting points. Every value remains editable, so the pattern is recalculated from your measurements rather than scaled from a fixed size.
Coordinated inseams, side seams and crotch curves
The draft builds front and back around the same horizontal levels and checks that corresponding inseams and side seams remain compatible before export.
Test the rise, seat and leg balance
Pants fit depends on body shape as well as circumference. Sew a test garment and check crotch depth, seat room, waist position, grainline, and how each leg hangs.
A4 tiled PDF, copyshop PDF or SVG
Print at 100% with page scaling disabled and measure the test square first. Use tiled A4 at home, copyshop PDF for one full-size sheet, or SVG for vector editing.
Who, how, and when
Drafting logic by Nastix Design
This generator is maintained as application code: measurements are converted into vector geometry, related seams are measured numerically where the construction requires it, and the same geometry is used for preview, SVG, copyshop PDF, and tiled A4 PDF.
Generator content and output workflow reviewed 13 July 2026. A generated block remains a fitting starting point; verify measurements, print scale, fabric behaviour, and a test garment.
Common questions
Custom pants pattern FAQ
Is the custom pants sewing pattern free?
Yes. Enter your measurements, preview the generated block, and download the front, back, and waistband as A4 PDF, copyshop PDF, or SVG without purchasing a standard-size pattern.
Does the pants generator use my measurements?
Yes. Presets supply starting values, but the final waist, hip, rise, leg length, knee, hem, ease, and dart geometry is recalculated from the values entered in the form.
Which pieces are included in the pants download?
The export includes front and back leg pieces, a straight waistband, selected waist darts, seam and hem allowances, grainlines, knee and hip guides, and a print test square.
Why should I make a test garment for pants?
Crotch shape and trouser balance depend on posture and body shape, which circumferences alone cannot fully describe. A test garment lets you correct the rise, seat, waist, and leg hang before cutting final fabric.
How should I print the A4 pants pattern?
Select actual size or 100%, disable fit-to-page scaling, and measure the 5 × 5 cm test square before trimming and joining the tiled pages.
Workflow
01
Enter body and length measurements
Use waist, hips, rise, outseam, inseam, knee, and hem values.
02
Check the generated block
Review front, back, waistband, grainline, hem fold, and construction guides.
03
Export for printing
Download SVG, copyshop PDF, or A4 tiled PDF at full scale.