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Estimate Lengths Worksheets for 2nd Grade

Choose the best estimate for the length of a real object. 15 free printable worksheets, each with an answer key.

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Free Estimate Lengths Worksheets

Click a worksheet to open the PDF, or grab the matching answer key. Every sheet prints on one page.

Estimate Lengths: what children learn

Estimating length means choosing a sensible measurement without a ruler, using what a child knows about real objects. A good estimate has both a sensible number and a sensible unit.

Estimate Lengths: worked example

How long is a crayon: 4 inches or 4 feet? 4 inches

A crayon fits in your hand, so 4 inches makes sense. 4 feet is as long as a small child is tall.

Estimate Lengths: a common mistake to watch for

Kids sometimes look only at the number and forget to check the unit.

Estimate Lengths: how to help at home or in class

Before measuring anything, ask your child to write down a guess, then measure with a ruler and see how close it was. Give a personal benchmark to lean on: measure the width of your child’s thumb or the span of a hand once, and use it to size up books, shoes and spoons. When the guesses land close and the units always make sense, your child is ready to measure more precisely.

What is on these Estimate Lengths worksheets

This set has 15 different worksheets for 2nd grade, with 7 questions on each and a matching answer key for every sheet. The instruction printed on each worksheet is: “Write the best estimate for each one.”

Example questions like the ones on these worksheets, with their answers:

  • How long is a pencil: 20 centimeters or 200 centimeters?20 centimeters
  • How long is a crayon: 90 centimeters or 9 centimeters?9 centimeters
  • How tall is a door: 20 meters or 2 meters?2 meters
  • How long is a key: 2 feet or 2 inches?2 inches
  • How long is a fork: 70 inches or 7 inches?7 inches
  • How tall is a second grader: 4 feet or 4 inches?4 feet
  • How long is a paper clip: 3 meters or 3 centimeters?3 centimeters

Every answer on every sheet is checked by a separate program before the worksheet is published. How we check answers

Related Measurement worksheets for 2nd grade

Measure Lengths in Inches
Read the length of a bar using a ruler marked in inches, from 1 to 12.
Measure Lengths in Centimeters
Read the length of a bar using a ruler marked in centimeters, from 1 to 30.
Compare Lengths by Measuring
Measure two bars with rulers, then compare their lengths with <, >, or =.
How Much Longer? (Length Difference)
Measure two bars, then subtract to find how much longer or shorter one is.
Choose the Best Unit of Length
Pick the best unit, inches, feet, yards, centimeters, or meters, to measure a thing.
All Measurement worksheets
See every measurement topic for 2nd grade