UTF-8 Byte Length Calculator

Calculate how many bytes a string occupies in UTF-8. ASCII uses 1 byte; Latin extended 2 bytes; CJK 3 bytes; emoji typically 4 bytes.

Networking
Algorithms
Binary & Number
Systems
Dev Metrics

IP Subnet Calculator

IP Address
CIDR Prefix
/
Network
192.168.1.0
Broadcast
192.168.1.255
Subnet Mask
255.255.255.0
First Host
192.168.1.1
Last Host
192.168.1.254
Usable Hosts
254
Binary breakdown:
IP: 11000000.10101000.00000001.00000000
Mask: 11111111.11111111.11111111.00000000
Net: 11000000.10101000.00000001.00000000
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How to Use

Enter the values for the scenario you are assessing. Calculate how many bytes a string occupies in UTF-8. ASCII uses 1 byte; Latin extended 2 bytes; CJK 3 bytes; emoji typically 4 bytes. Use the utf-8 byte length result to inform your calculation.

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Frequently Asked Questions