EasyCalc4U
IT & Tech

IT & Tech Calculators

Fast, practical calculators for networking, data storage, backups, bandwidth planning, streaming, and everyday IT work.

Updated May 2026No signup requiredBuilt for mobile
IT Tools

Data Calculations & Conversions

Pick the calculator that matches the job you are planning.

Data Storage ConverterConvert bits, bytes, decimal storage units, and binary units like GiB and TiB.Data Transfer CalculatorEstimate how much data moves over a link during a set amount of time.Download Time CalculatorEstimate file download time from file size and connection speed.Upload Time CalculatorEstimate upload time for cloud backups, videos, and large files.
IT Tools

Networking

Pick the calculator that matches the job you are planning.

Subnet CalculatorCalculate IPv4 network, broadcast, usable hosts, and subnet mask from CIDR.CIDR to Subnet Mask ConverterConvert a CIDR prefix into subnet mask, total addresses, and usable hosts.
IT Tools

Bandwidth & Transfer Planning

Pick the calculator that matches the job you are planning.

Bandwidth Usage CalculatorEstimate daily or monthly bandwidth usage for users, devices, and events.Download Time CalculatorEstimate file download time from file size and connection speed.Upload Time CalculatorEstimate upload time for cloud backups, videos, and large files.Data Transfer CalculatorEstimate how much data moves over a link during a set amount of time.
IT Tools

Streaming & Video

Pick the calculator that matches the job you are planning.

Streaming Bitrate CalculatorPlan livestream data usage, upload headroom, and recording storage.Video Storage CalculatorEstimate video file size from bitrate, duration, audio, and recording count.Upload Time CalculatorEstimate upload time for cloud backups, videos, and large files.
IT Tools

Backup & Infrastructure

Pick the calculator that matches the job you are planning.

Backup Storage CalculatorPlan backup storage from full backups, change rate, retention, and compression.RAID Storage CalculatorEstimate raw and usable RAID capacity with fault-tolerance notes.Data Storage ConverterConvert bits, bytes, decimal storage units, and binary units like GiB and TiB.

Starter IT guides

Decimal vs Binary Storage GuideUnderstand why GB and GiB are different, why drives appear smaller in operating systems, and when each unit matters.MB vs Mbps GuideMegabytes and megabits are easy to mix up. This guide explains the difference for internet speed, file size, streaming, and backups.Download Speed vs File Size GuideLearn why file size, speed units, Wi-Fi, VPN overhead, and server limits all affect transfer time.Backup Retention Planning GuidePlan backup storage around full backups, increments, change rates, retention, dedupe, compression, and restore testing.Video Bitrate Storage GuideEstimate video storage from bitrate, duration, audio, resolution, and recording count without guessing.Subnetting Basics GuideA plain-English guide to IPv4 subnets, masks, network addresses, broadcast addresses, and usable hosts.CIDR Notation GuideLearn what CIDR slash notation means and how prefixes map to subnet masks and host counts.RAID Is Not Backup GuideRAID can help availability, but it does not replace backups, retention, offsite copies, or restore testing.
FAQ

IT calculator questions

Which IT calculator should I use first?

For storage questions, start with the Data Storage Converter. For transfer timing, start with Download Time or Upload Time. For networks, start with the Subnet Calculator.

Do these calculators use bits or bytes?

They label bits and bytes separately because confusing Mbps and MB/s is one of the most common IT planning mistakes.

Are real transfer speeds lower?

Often, yes. Wi-Fi, VPNs, protocol overhead, hardware limits, and throttling can all reduce real-world throughput.

Topic cluster

IT, data, backup, streaming, and subnetting

Use these related tools together for better planning instead of treating each estimate as a one-off number.

Data Storage ConverterConvert bits, bytes, GB, GiB, TB, and TiB.Data Transfer CalculatorEstimate transferred data over time.Download Time CalculatorEstimate file download time.Upload Time CalculatorEstimate upload time.Bandwidth Usage CalculatorPlan bandwidth and data usage.Subnet CalculatorCalculate IPv4 subnet ranges.Backup Storage CalculatorPlan backup storage.RAID Storage CalculatorEstimate usable RAID capacity.
New and related

Subnetting and Linux permission tools

These tools strengthen the topic cluster and send visitors to the most useful next calculator.

VLSM Subnet PlannerPlan multiple variable-length IPv4 subnets.Chmod Permission CalculatorConvert Linux permissions to numeric chmod values.Subnet CalculatorInspect one IPv4 subnet.CIDR to Subnet Mask ConverterConvert CIDR prefixes to masks.
Network, storage, and cloud

Advanced IT Planning Calculators

Plan IPv6 subnets, CIDR ranges, VLANs, TCP throughput, storage IOPS, VM sizing, and cloud storage budgets.

IPv6 Subnet CalculatorCalculate an IPv6 network prefix, first address, last address, and address count from an IPv6 address and prefix length.IP Range to CIDR CalculatorConvert an IPv4 start and end address into the smallest list of CIDR blocks for firewall, routing, and ACL planning.ACL Wildcard Mask CalculatorConvert IPv4 CIDR prefixes and subnet masks into ACL wildcard masks for routing and firewall planning.VLAN PlannerPlan VLAN IDs, names, subnet sizes, gateway suggestions, usable host ranges, and IP address capacity.Supernet CalculatorSummarize multiple IPv4 CIDR networks into a larger covering route where possible for routing and documentation.TCP Bandwidth Delay Product CalculatorEstimate bandwidth delay product and ideal TCP window size from link speed and round-trip latency.Packet Loss Throughput CalculatorEstimate how packet loss, latency, MSS, and link speed can reduce TCP throughput.IOPS CalculatorEstimate storage IOPS capacity, physical I/O demand, read/write mix, drive count, and RAID write penalty.VM Sizing CalculatorEstimate vCPU, RAM, and storage requirements for simple virtual machine planning.Cloud Storage Cost CalculatorEstimate monthly cloud storage cost from stored data, monthly growth, cost per GB, egress, and request charges.