Mobile Recharge Plan Calculator: Cost per Day, per Month and per GB
Free tool · Updated October 2, 2026 · By CouponTalk
Your result
Enter your measurements to see your result.
Quick answer
To compare plans with different validity, convert each to a cost per day. A ₹349 plan for 28 days costs ₹12.46 a day; an ₹859 plan for 84 days costs ₹10.23 a day, so the longer plan saves about ₹817 a year. Divide by data per day for cost per GB: 2 GB a day costs ₹6.23 per GB, and 1.5 GB a day costs ₹6.82 per GB.
How to use this calculator
- Copy the price, validity and daily data of two plans from your operator's app.
- Enter 0 for daily data if a plan gives total data; divide total GB by validity first.
- Compare cost per day for price and cost per GB for data value.
Formula
Cost per day = price ÷ validity days
Cost per 30 days = cost per day × 30; per year = cost per day × 365
Cost per GB = price ÷ (data per day × validity)
Operators change plan prices often. Check the latest plans in your operator's app before you recharge.
Frequently asked questions
Why do some plans have 28 days of validity?
A 28-day plan means 13 recharges a year instead of 12, so compare cost per day, not per recharge.
Is a yearly plan always cheaper?
Usually per day, but you pay upfront and lose flexibility if prices drop or you switch operators.
Does unused daily data carry forward?
On most prepaid daily-data plans, unused data does not carry over to the next day.
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