Start with this decision
Start with the constraint: host count for networks, speed for transfers, retention for backups, or usable capacity for RAID.
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
Start Here
Top IT planning calculators by intent
Use this hub to plan network capacity, file transfer windows, backup storage, RAID capacity, cloud usage, and small-office growth.
Common next step
Move from sizing into transfer time, storage, and recovery planning before buying hardware or cloud capacity.
Round in the useful direction
Round device count, storage, and retention up; round expected transfer speed down for real-world overhead.
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.
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.
IT Tools
Backup & Infrastructure
Pick the calculator that matches the job you are planning.
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.
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.