Speed converters
Move cleanly between Mbps, MB/s, and data per hour.
Free · Private · Instant
Download Time Calculator & Internet Speed Tools
Estimate file transfers with our Download Time Calculator, convert connection rates using the Mbps to MB/s Converter, plan monthly usage with the Internet Data Usage Calculator, or map networks with the IPv4 Subnet Calculator. Explore our practical guides for clear explanations behind every result.
01 No sign-up02 No uploads03 Runs in your browser
Built for clarity
Practical tools. Precise answers.
Data planners
Understand streaming and monthly data before you commit.
Network calculators
Plan bandwidth, transfer time, and IPv4 subnets accurately.
The toolkit
Everything you need to make sense of your connection.
DTReady
Time
Download Time
Estimate a file or game download time from its size and your internet speed.Open tool ↗UTReady
Time
Upload Time
Estimate video, file, and cloud-backup upload time from size and sustained upload speed.Open tool ↗SMReady
Speed
Mbps to MB/s
Convert internet or network speed from Mbps to file-transfer speed in MB/s with the divide-by-eight formula.Open tool ↗MGReady
Speed
Mbps to Gbps
Convert megabits per second to gigabits per second for broadband, Wi-Fi, Ethernet, and network planning.Open tool ↗MSReady
Speed
MB/s to Mbps
Convert a browser, launcher, or storage rate from MB/s to the equivalent network speed in Mbps.Open tool ↗GHReady
Speed
Mbps to GB/hour
Convert a sustained Mbps rate into decimal GB transferred per hour or day.Open tool ↗DUReady
Data
Data Usage
Estimate monthly GB for streaming, video calls, browsing, gaming, and everyday internet use.Open tool ↗SDReady
Data
Streaming Data
Estimate hourly, daily, and monthly streaming data for 480p, 720p, 1080p, and 4K video.Open tool ↗BSReady
Network
Bandwidth Sharing
Estimate equal Mbps per active device after reserving bandwidth for overhead and traffic bursts.Open tool ↗FTReady
Time
File Transfer Time
Estimate copy time across Ethernet, Wi-Fi, NAS, USB, SSD, and other transfer paths.Open tool ↗IPReady
Network
IPv4 Subnet
Calculate a network, host range, broadcast, subnet mask, and wildcard mask from an IPv4 address and CIDR prefix.Open tool ↗New open project · Public alpha
A focused DNS blocklist, built in the open.
Independently researched rules for ads, trackers, and telemetry—tested on AdGuard Home and Pi-hole, with every change visible on GitHub.
Accuracy without friction
Useful answers, with the math left visible.
Every calculator shows its assumptions, units, and method—so you can understand the result instead of trusting a mystery number.
See how our calculations workPrivate by design
Launch calculators run locally in your browser. Your values are not uploaded.
Clear assumptions
Ideal estimates and real-world overhead are labeled separately.
Built for real decisions
Examples mirror downloads, backups, streaming, and network planning.
Field notes
Understand the numbers behind your network.
Guide 01Guide 03Guide 04
Internet fundamentals
Mbps vs MB/s: the small “b” that changes everything
6 min read · Read guide ↗Real-world speed
Why downloads rarely match the number on your internet plan
8 min read · Read guide ↗Data planning