Free Overage Calculator
What are data overages costing your fleet?
Estimate your monthly cellular and Starlink overage exposure in seconds — then see exactly which devices are on pace to blow their cap.
Estimate your monthly overage
Enter your plan and fleet details. The math runs in your browser as you type.
Projected monthly overage
$0
Enter your numbers above to see your estimate.
Unlock the full per-device breakdown
See the cost per device and how many are on pace to exceed the cap. We'll email your breakdown — no spam.
How the estimate is calculated
For each device we take projected usage minus the plan cap. Anything above the cap is billed at your overage rate, so per-device overage is max(0, usage − cap) × rate. Multiply by your device count for the fleet total, and count how many devices are projected to cross the cap. It is a planning estimate — real usage varies device to device — but it is usually enough to see whether your plans are sized right.
Want the real thing instead of an estimate? OnePane does this continuously against live usage and alerts you mid-cycle. Read more in how predictive overage alerts work.
Overage calculator FAQ
How does the overage calculator work?
Enter your plan's data cap per device, how many devices you run, projected usage per device, and your overage rate per GB. The calculator projects total monthly overage cost and flags how many devices are on pace to exceed the cap.
Is my estimate saved or shared?
The calculation runs entirely in your browser. If you enter your email to unlock the full per-device breakdown, we use it only to follow up about OnePane; see our Privacy Policy.
Does this cover Starlink as well as cellular?
Yes. The math is the same for any metered plan — Starlink service lines or cellular SIM/data-pool plans. OnePane monitors both and can alert you before a line exceeds its cap.
How do I actually prevent these overages?
OnePane projects each line's live usage against its plan mid-cycle and warns you before a device exceeds its cap, across Starlink and every cellular vendor. Start free to turn these estimates into real-time alerts.
Is OnePane affiliated with any carrier or Starlink?
No. OnePane is an independent platform and is not affiliated with, endorsed by, or sponsored by any carrier, SpaceX or Starlink. Vendor names identify the devices and plans OnePane monitors.
Starlink® is a trademark of Space Exploration Technologies Corp. (SpaceX). Cradlepoint®, Ericsson®, Peplink®, Cisco Meraki®, Teltonika®, Sierra Wireless® and Digi® are trademarks of their respective owners. OnePane is an independent software platform and is not affiliated with, endorsed by, or sponsored by any third-party vendor named here. These names are used solely to identify or compare the products OnePane manages, consistent with nominative fair use. See our Terms.