Power Calculators

👙 Bikini Size Calculator

Estimate bikini top, bottom and overall size from bust, waist and hip measurements using meters, centimeters, inches or feet.

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Enter details

Choose the unit you will use for all body measurements.
Measure around the fullest part of the bust.
Measure around the natural waist or the point used by the selected size chart.
Measure around the fullest part of the hips and seat.

Fill in the details and click Calculate to see your results.


Also available in our Android app, with charts and full breakdown tables.

📘 About the Bikini Size

This bikini size calculator estimates bikini top and bottom sizing from bust, waist and hip measurements.

You can enter measurements in meters, centimeters, inches or feet.

The calculator keeps the top and bottom calculations separate because a person can require different sizes for the upper and lower body.

The reference size model is based on published womens swimwear measurement ranges. Bikini sizing is not a universal international standard and can vary between brands and individual products.

✏️ Worked examples

Example 1 - Centimeters

You enter
Measurement UnitCentimeters (cm)
Bust Measurement90
Waist Measurement74
Hip Measurement98
You get
Bust (cm)90
Waist (cm)74
Hips (cm)98
Bikini Top Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL4
Bikini Bottom Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL4
Overall Bikini Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL4

Enter a 90 cm bust, 74 cm waist and 98 cm hips.

Try this example →

Example 2 - Inches

You enter
Measurement UnitInches (in)
Bust Measurement36
Waist Measurement29
Hip Measurement39
You get
Bust (cm)91.44
Waist (cm)73.66
Hips (cm)99.06
Bikini Top Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL4
Bikini Bottom Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL4
Overall Bikini Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL4

Enter a 36 inch bust, 29 inch waist and 39 inch hips.

Try this example →

Example 3 - Meters

You enter
Measurement UnitMeters (m)
Bust Measurement0.95
Waist Measurement0.75
Hip Measurement1.02
You get
Bust (cm)95
Waist (cm)75
Hips (cm)102
Bikini Top Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL5
Bikini Bottom Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL5
Overall Bikini Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL5

Enter a 0.95 m bust, 0.75 m waist and 1.02 m hips.

Try this example →

🧭 How to use this calculator

What you enter

  • Measurement UnitChoose the unit you will use for all body measurements.
  • Bust MeasurementMeasure around the fullest part of the bust.
  • Waist MeasurementMeasure around the natural waist or the point used by the selected size chart.
  • Hip MeasurementMeasure around the fullest part of the hips and seat.

What you get

  • Bust (cm)
  • Waist (cm)
  • Hips (cm)
  • Bikini Top Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL
  • Bikini Bottom Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL
  • Overall Bikini Size Code - 1=XXXS, 2=XXS, 3=XS, 4=S, 5=M, 6=L, 7=XL, 8=XXL

💡 How the bikini size is calculated

  • Your selected measurement unit is converted to centimeters.
  • The bust measurement determines the estimated bikini top size.
  • The waist and hip measurements are separately evaluated for the bikini bottom.
  • The larger requirement from waist and hips is used for the bottom size.
  • The overall bikini size uses the larger requirement between the top and bottom.

💡 How to measure your bust

  • Measure around the fullest part of your bust.
  • Keep the measuring tape level around your body.
  • Keep the tape comfortably snug without compressing breast tissue.
  • Stand naturally while measuring.

💡 How to measure your waist

  • Measure around your natural waist.
  • Keep the tape comfortably snug.
  • Do not hold your stomach in while measuring.
  • Keep the tape level around your body.

💡 How to measure your hips

  • Measure around the fullest part of your hips and seat.
  • Stand naturally with your feet together.
  • Keep the tape level around the body.
  • Do not pull the tape excessively tight.

💡 Bikini size mapping

  • Size code 1 = XXXS.
  • Size code 2 = XXS.
  • Size code 3 = XS.
  • Size code 4 = S.
  • Size code 5 = M.
  • Size code 6 = L.
  • Size code 7 = XL.
  • Size code 8 = XXL.

💡 Why separate top and bottom sizes matter

  • Bikini tops are primarily fitted using bust measurements.
  • Bikini bottoms are primarily fitted using waist and hip measurements.
  • Body proportions can mean that the best top and bottom sizes are different.
  • For a bikini set with separate sizing, use the individual top and bottom results rather than forcing one size.

💡 Important sizing limitation

  • There is no single universal bikini sizing standard.
  • Different brands can use different measurement ranges.
  • Fabric stretch can change how a bikini fits.
  • High waist, low waist, cheeky, full coverage and other cuts can fit differently.
  • Always compare your measurements with the exact product size chart before purchasing.

❓ Frequently asked questions

Can I enter bikini measurements in meters?

Yes. Select meters and enter the bust, waist and hip measurements in meters.

Can I enter bikini measurements in centimeters?

Yes. Centimeters are supported and are commonly used in swimwear size charts.

Can I enter bikini measurements in inches?

Yes. Select inches and enter all three measurements in inches.

Can I enter bikini measurements in feet?

Yes. Select feet and enter all three measurements in feet.

Why are bikini top and bottom sizes calculated separately?

Bust, waist and hip proportions vary between people, so the correct top and bottom sizes can be different.

Is bikini sizing universal?

No. Bikini sizing varies between brands, countries, styles and product lines. The calculator provides a reference estimate rather than a universal size.

What should I do if my top and bottom sizes are different?

If the bikini is sold as separates, use the calculated top and bottom sizes independently. If the product only comes as one fixed-size set, compare the measurements with the manufacturers chart and consider the fit priority for the particular style.