Free Jeans Size Calculator

Jeans Size Calculator: A Quick Overview

This jeans size converter tool is designed to help you answer the common question “what size jeans am I?” by converting your body measurements or existing jeans dimensions into the corresponding sizes across the US, UK, EU, Italy, Japan (women), and Russia (women) sizing systems. Whether you need a jeans size chart for quick reference or a detailed jeans measurement guide, this calculator provides accurate results in just a few steps.

How to Use the Jeans Size Converter

The process involves four simple inputs:

1. Select your sex — to display the appropriate men’s or women’s size chart.
2. Choose the measurement method — decide whether you are measuring your own body or a pair of jeans.
   • Measuring yourself: Wrap a measuring tape around your waist at the level of your belly button while standing relaxed. Record the circumference as your waist measurement.
   • Measuring a pair of jeans: Lay the jeans flat on a hard surface. Measure the waistband from left edge to right edge across the front, passing over the button and zipper. Double this value to get the full waist circumference.
3. Enter the waist length — input the number you obtained (in inches or centimeters; the tool accepts both metric and imperial units).
4. Enter the inseam length — the inner leg measurement:
   • For body measurement: Run the tape from your crotch down the inside of your leg to the point where you want the hem to end (typically just above the ankle).
   • For jeans: Follow the inner seam from the crotch junction to the bottom of the leg hem.

After you provide these two numbers, the calculator instantly shows your equivalent sizes in the US (waist/inseam fraction, numeric size, and letter size), UK, EU, Italy, and, for women, Japan and Russia.

How Jeans Sizes Are Structured

In the United States, jeans are commonly labeled using a waist‑to‑inseam ratio expressed in inches—for example, $28 \times 30$. This same information can also be represented by a single number (e.g., 30–50 for men, 0–30 for women) or by standard letter sizes such as S, M, L. The following tables provide comprehensive jeans size chart conversions for women and men. All measurements are given in inches, along with metric equivalents for convenience.

Note: The sizing data below represent typical conversions; atypical jean cuts, stretch fabrics, and lesser‑known brands may require different measurements and may not follow these charts exactly. Always consult the brand’s own size guide when possible.

Women’s Jeans Size Conversion Chart

The table lists waist and inseam measurements in both inches and centimeters, followed by the corresponding size designations across the US, UK, EU, Italy, Russia, and Japan.

Waist (in)	Waist (cm)	Inseam (in)	Inseam (cm)	US Size (W/L & letter)	UK	EU	Italy	Russia	Japan
25	63.5	32	81	25/32, 0 (XXS)	4	32	36	38	7
26	66.0	32	81	26/32, 2 (XS)	6	34	38	38/40	7/9
27	68.6	32	81	27/32, 4 (XS)	8	36	40	–	9
28	71.1	32	81	28/32, 6 (S)	10	38	42	42/44	9/11
29	73.7	32	81	29/32, 8 (S)	12	40	44	46	11
30	76.2	32	81	30/32, 10 (M)	14	42	46	48	11/13
31	78.7	32	81	31/32, 12 (M)	16	44	48	50	13
32	81.3	32	81	32/32, 14 (L)	18	46	50	54	13/15
33	83.8	32	81	33/32, 16 (L)	20	48	52	58	13/15
34	86.4	32	81	34/32, 18 (XL)	22	50	54	60/62	15
35	88.9	32	81	35/32, 20 (XL)	24	52	56	64	15/17
36	91.4	32	81	36/32, 22 (XXL)	26	54	58	66/68	17
37	94.0	32	81	37/32, 24 (XXL)	28	56	60	70	–
38	96.5	32	81	38/32, 26 (XXXL)	30	58	62	–	–
39	99.1	32	81	39/32, 28 (XXXL)	32	60	64	–	–

Note: The inseam in this chart is 32 inches (81 cm), which is a standard “regular” length. Some brands offer short (30 in / 76 cm) or long (34 in / 86 cm) versions.

Men’s Jeans Size Conversion Chart

The men’s chart includes waist measurements from 28 to 44 inches and a standard inseam of 30–34 inches depending on the size range. Metric equivalents are provided for ease of use.

Waist (in)	Waist (cm)	Inseam (in)	Inseam (cm)	US Size (W/L & letter)	UK	EU	Italy
28	71.1	30	76	28/30, 30 (XS)	30	40	–
29	73.7	30	76	29/30, 32 (XS)	32	42	–
30	76.2	32	81	30/32, 34 (S)	34	44	34
31	78.7	32	81	31/32, 36 (S)	36	46	–
32	81.3	32	81	32/32, 36 (S)	36	46	–
33	83.8	32	81	33/32, 38 (M)	38	48	–
34	86.4	32	81	34/32, 40 (M)	40	50	–
36	91.4	34	86	36/34, 42 (L)	42	52	–
38	96.5	34	86	38/34, 44 (L)	44	54	–
40	101.6	34	86	40/34, 46 (XL)	46	56	–
42	106.7	34	86	42/34, 48 (XL)	48	58	–
44	111.8	34	86	44/34, 50 (XXL)	50	60	–

Note: The men’s inseam varies by waist size: 30 inches for sizes 28–29, 32 inches for sizes 30–34, and 34 inches for sizes 36–44. Always check the specific product’s inseam length before purchasing.

Final Tips for Finding Your Perfect Fit

• Convert your waist and inseam measurements carefully; the tool accepts both inches and centimeters.
• Remember that sizing can vary significantly between brands, especially for stretch jeans, high‑rise cuts, or vintage labels. Use the charts as a starting point and always refer to the brand’s official size guide when available.
• If you already have a well‑fitting pair, measuring them directly gives the most reliable starting point.
• The jeans size converter above replaces the need for manual table look‑ups and provides an instant jeans size US UK EU cross‑reference.

This quick jeans measurement guide should help you navigate the often confusing world of denim sizing. With the jeans size chart and the calculator at hand, you can confidently shop online or in stores, knowing which size to grab.