Online Calculators & Tools

Color image to black and white converter

RGB to grayscale image conversion online:

Original image:
Converted image:

How to Convert Color images to Black and White :-

Color image to black and white it was very simple to convert Color images to Black and White. upload your Color image and Click the download button the Black and White image will be download in your local disk.

How to convert RGB to grayscale

Gray RGB color code has equal red,green and blue values:

 R = G = B

For each image pixel with red, green and blue values of (R,G,B):

R' = G' = B' = (R+G+B) / 3 = 0.333R + 0.333G + 0.333B

This formula can be changed with different weights for each R/G/B value.

R' = G' = B' = 0.2126R + 0.7152G + 0.0722B


R' = G' = B'  = 0.299R + 0.587G + 0.114B



Pixel with RGB values of (30,128,255)

The red level R=30.

The green level G=128.

The blue level B=255.

R' = G' = B' = (R+G+B) / 3 = (30+128+255) / 3 = 138

so the pixel will get RGB values of: