Square Root of 402 (√402 = 20.049938)

Exact Answer

√402 = 20.049938

Principal Root (√402)

20.049938

Real Roots

±20.049938

Perfect Square?

No (Irrational)

Exponential Form

402^(1/2)

Reduce / Convert Fraction:

Convert Fraction:

Enter Decimal Number:

Enter Percentage: %

What is % of

From Value: To Value:

Simplify Ratio: :

Switch to Proportion / Missing X Solver (A/B = C/D) →

Enter 3 known numbers and leave 1 empty (or type x) to solve:

← Switch to Ratio Simplifier (A:B)

Provide any 2 values below to calculate the remaining:

Price before discount

Discount

Price after discount

You saved

+ Add Sales Tax & Extra Coupon (Optional)

Sales Tax: % Extra Off: %

Provide any 2 values below to calculate the remaining:

Cost

Markup

REVENUE

Gross Profit

Profit Margin

Bill Subtotal

Tip Percentage

Split (People)

👥

Quick Tip:

Total Bill

Split Between

👥

Tip % (Optional)

Include Tip:

Total Price

Quantity

Unit of Measure

← Discount & Sales Tax • Ratio Simplifier (A:B) →

First Number: Second Number:

Find All Factors of:

Dividend: ÷ Divisor:

Number to Round: To Nearest:

Method: Standard (5+ ↑) Always Up (Ceil) Always Down (Floor)

Presets:

√ Square Root of: OR Power (x^y): ^{^}

x² + x + = 0

Number (n! & log):

Circle Radius (r):

Side a: Side b:

Angle (Degrees): °

Numbers (comma separated):

Total Items (n): Choose (r):

Decimal Number:

Number (1–3999):

Step-by-Step Solution: √402 = 20.049938

Step 1

Definition of Square Root

The square root of 402 is the number y such that y × y = 402.

√402 = 20.049938

Summary & Alternative Representations

Property / Format	Value
Principal Root (√402)	`20.049938`
Real Roots	`±20.049938`
Perfect Square?	`No (Irrational)`
Exponential Form	`402^(1/2)`

Was this solution helpful?

Help us improve our free step-by-step tools

Frequently Asked Questions

Is 402 a perfect square?

No, 402 is not a perfect square; its decimal approximation is 20.049938.