Height Calculator Feet Inches to Cm

Convert your height between centimeters, meters, feet, and inches in seconds, then use the built-in prediction tool to estimate a child's adult height from family measurements.

Conversion Results

How to Use This Height Calculator

Use the converter when you need a fast measurement conversion, and switch to prediction when you want a rough estimate of a child's adult stature based on parental height and current growth data.

1

Enter Your Height

Type a number such as 170 cm, 1.7 m, or 5.7 ft, depending on the format you already have.

2

Select Unit

Choose the unit you are starting with, such as centimeters, feet, or meters, so the calculator can map the value correctly.

3

Get Results

Review the converted output in metric units and imperial units, then use those numbers for forms, fitness goals, health records, or travel documents.

If you are using the child height prediction tool, enter the father's height, mother's height, the child's current height, weight, age, and gender. The tool then applies a simplified mid-parental formula with a basic adjustment so you can see an estimate in centimeters, meters, and feet and inches.

For the best result, measure height without shoes, stand against a wall, keep heels together, and look straight ahead. Small errors in posture or shoe thickness can shift the final number, especially when you are comparing growth chart entries over time.

Understanding Your Results

Your result is more useful when you know what each unit means, how rounding works, and why a conversion result is different from a growth estimate.

Reading Metric and Imperial Units

Most countries record stature in centimeters and meters, while the US commonly speaks in feet and inches. If your calculator result says 170 cm, that same value also equals 1.70 meters and about 5 feet 6.9 inches. You may see slight differences depending on how far the number is rounded. In sports rosters, clinic paperwork, and passport forms, that rounding can matter, so it is smart to keep the exact decimal until the final step.

A direct conversion is exact because it relies on fixed measurement conversion rules. For example, one inch is always 2.54 centimeters. That means every result from the converter is deterministic. By contrast, a child height prediction is only an estimate because human growth depends on genetics, puberty timing, sleep, nutrition, medical history, and day-to-day measurement error.

What a Prediction Result Can and Cannot Tell

The prediction tab is best used as a planning and curiosity tool, not a diagnosis. It blends parental height with current child data to estimate a future adult height. That is useful if you want a rough benchmark for a growth chart or if you want to compare one measurement date to another. Still, it should never replace professional guidance if a pediatrician is concerned about growth rate, delayed puberty, or sudden changes in percentile.

When you see a prediction result, think of it as a reasonable range centered around a likely outcome. A child who sleeps well, eats enough protein and calcium, stays active, and does not have a growth-related medical condition is more likely to stay near their expected path. A child who measures much shorter or taller than peers may still be healthy, but percentiles and growth velocity matter more than a single isolated number.

Quick Reference Conversions

  • 1 foot = 30.48 cm
  • 1 inch = 2.54 cm
  • 1 meter = 100 cm
  • 5 foot 7 = 170.18 cm
  • 180 cm = 5 foot 10.87 inches

Why Daily Measurements Can Differ

You are usually tallest right after sleep and slightly shorter at night. That happens because the discs in your spine compress as you walk, sit, lift, and move through the day. A morning measurement and an evening measurement can differ by 0.5 to 2 centimeters. That is normal and does not mean your long-term height changed.

  • Measure at the same time of day when you are tracking a child on a growth chart.
  • Stand without shoes and keep your head level so your line of sight stays parallel to the floor.
  • Use a wall and a flat object to mark the top of the head before reading the tape measure.
  • Record the exact decimal if the result will be used for a medical form or athlete profile.

In many US medical records, staff enter feet and inches during the visit, but the software may also store the value in centimeters. That makes a converter especially useful when you compare results across labs, schools, sports teams, and international paperwork.

The Formula Explained

If you want to calculate height manually, you only need a few standard formulas and one careful rounding step.

The most common conversion starts with inches. Since 1 inch = 2.54 centimeters, you can convert any imperial height to metric by turning feet into inches first, adding the extra inches, and then multiplying by 2.54. If you are moving the other way, divide centimeters by 2.54 to get total inches, then divide that number by 12 to separate feet from inches.

Here is a worked example with real numbers. Suppose you want to convert 5 feet 7 inches to centimeters. First, convert the feet portion to inches: 5 x 12 = 60 inches. Then add the remaining 7 inches, so the total is 67 inches. Finally, multiply 67 x 2.54 = 170.18 cm. If you want meters, divide 170.18 by 100 to get 1.7018 m.

Now reverse the process with a metric example. Suppose a clinic report says a child is 142 cm tall. Divide 142 by 2.54 to get 55.91 inches. Then divide 55.91 by 12. The whole number is 4 feet, and the remainder is 7.91 inches. That means 142 cm is about 4 feet 7.9 inches. If you round to the nearest inch for casual use, you could say the child is about 4 feet 8 inches tall.

Core height formulas

  • Feet to centimeters: feet x 30.48
  • Inches to centimeters: inches x 2.54
  • Feet and inches to centimeters: (feet x 30.48) + (inches x 2.54)
  • Centimeters to inches: cm / 2.54
  • Centimeters to feet: cm / 30.48
  • Centimeters to meters: cm / 100

For child height prediction, the calculator uses a simplified mid-parental formula. A common method averages parental height and then adjusts for sex: add about 13 cm for boys or subtract about 13 cm for girls before taking the average. Many pediatric tools use more advanced models, but the basic idea is the same: parental height is a strong signal, though not the only one.

Because the prediction side is not a medical device, use it as an educational estimate. If a child crosses percentile lines quickly, seems much shorter than expected, or has other health concerns, it is better to review the growth chart with a clinician than to rely on a single formula.

Common Use Cases & Tips

These everyday examples show where a fast height calculator saves time and helps you avoid unit mistakes.

1. Filling out a US health form

A patient portal asks for height in feet and inches, but your last clinic report lists 168 cm. Divide 168 by 2.54 to get 66.14 inches. That becomes 5 feet 6.1 inches. For most forms, you would enter 5 feet 6 inches.

2. Checking a sports roster

A youth basketball roster shows a player at 6 feet 1 inch. To compare that with an international training record, convert the height to centimeters: (6 x 30.48) + (1 x 2.54) = 185.42 cm. That makes it easier to compare athletes across metric units and imperial units without guesswork.

3. Tracking a child's growth over the school year

Your child measures 130 cm in September and 134.5 cm in March. The difference is 4.5 cm, which is about 1.77 inches of growth. When you record those dates the same way each time, you get a cleaner picture of growth velocity than if you switch between shoes, wall marks, and tape positions.

4. Shopping for travel or outdoor gear

A sleeping bag size chart uses centimeters, but you know your height as 5 feet 10 inches. Convert to inches first: 5 x 12 + 10 = 70 inches. Then multiply 70 x 2.54 = 177.8 cm. That helps you choose the right fit before you buy.

5. Estimating a child's adult height

If one parent is 178 cm and the other is 165 cm, the average parental height is 171.5 cm. A simple mid-parental estimate would be about 178 cm for a boy or about 165 cm for a girl after applying the standard adjustment. That does not guarantee the result, but it gives you a reasonable benchmark.

6. Comparing morning and evening stature

You measure 172.2 cm at 7:00 AM and 171.3 cm at 9:00 PM. The difference is 0.9 cm. That is normal daily compression, not true long-term height loss. Use a consistent time if you want apples-to-apples tracking.

Height Conversion Chart & Reference Table

A quick chart is one of the biggest content gaps on many height calculator pages, so here is a handy reference you can scan without retyping values.

Centimeters Meters Feet & Inches Total Inches
150 cm 1.50 m 4 ft 11.1 in 59.06 in
160 cm 1.60 m 5 ft 3.0 in 62.99 in
170 cm 1.70 m 5 ft 6.9 in 66.93 in
175 cm 1.75 m 5 ft 8.9 in 68.90 in
180 cm 1.80 m 5 ft 10.9 in 70.87 in
190 cm 1.90 m 6 ft 2.8 in 74.80 in

This table is helpful when you need quick answers for school forms, apparel size guides, athlete profiles, or visa paperwork. Instead of redoing the arithmetic each time, you can scan the nearest value and then fine-tune with the calculator if you need a more precise decimal.

If you work with kids' growth data, pair the chart with exact measurement dates. A chart is good for fast comparisons, but a growth chart still matters more because it shows percentiles and trends over time, not just one isolated measurement.

Related Calculators

These tools pair naturally with height conversion when you are tracking body measurements, growth, or energy needs.

Age Calculator

Use our precise age calculator to record the exact years and months tied to each growth chart entry.

Time Calculator

Calculate time gaps between measurements, workouts, or follow-up visits with a simple duration tool.

BMI Calculator

Pair your converted height with weight to estimate body mass index using our BMI calculator.

Date Calculator

Count days between pediatric appointments or training dates when you are monitoring change over time.

BMR Calculator

Estimate resting calorie needs with a BMR calculator that uses height as a key input.

TDEE Calculator

Use your converted height and activity level to estimate total daily energy expenditure.

Frequently Asked Questions

These are the conversion and prediction questions people ask most often before using a height calculator.

Divide centimeters by 2.54 to get total inches. Then divide total inches by 12. The whole number is feet, and the remainder is inches. For example, 170 cm divided by 2.54 is 66.93 inches, which is 5 feet 6.93 inches.

5 foot 7 equals 170.18 cm. First convert 5 feet 7 inches to 67 total inches, then multiply 67 by 2.54.

Multiply feet by 30.48 to convert directly to centimeters. If you also have inches, multiply inches by 2.54 and add that amount to the feet result.

170 cm is slightly under 5 foot 7. It equals about 5 foot 6.9 inches, so the difference is very small and usually comes from rounding.

The core formulas are 1 inch equals 2.54 cm, 1 foot equals 12 inches, 1 foot equals 30.48 cm, and 1 meter equals 100 cm. Most height conversions are built from those four relationships.

Yes. Your spine compresses through the day, so many people measure a little taller in the morning than at night. The change is often around 0.5 to 2 cm.

A height prediction calculator gives an estimate, not a guarantee. Genetics, puberty timing, sleep, nutrition, medical conditions, and measurement error can all affect the final result.

Many US clinics measure height in feet and inches at intake, but electronic records often store the value in centimeters as well. That is why a fast converter is useful for forms, charts, and patient portals.

Adults can lose height because spinal discs thin, posture changes, and bone density can decline over time. The change is usually gradual, but it can become more noticeable in older age.