Min-weight overlap
For each company two funds both hold, the shared part is the smaller of the two weights. Sum that over every shared stock and you get the real overlap, a number from 0% (nothing in common) to 100% (identical portfolios).
OVL-02 // portfolio overlap
Portfolio Overlap
Add the funds you hold and see how much they really share. Not the naive "they both own HDFC", but the shared exposure that survives the weights: if one fund holds HDFC at 0.5% and another at 15%, only 0.5% truly overlaps.
How to read this calculator
Your consolidated portfolio
Every fund's holdings are combined into one list, weighted by the money you hold in each fund. That shows your true exposure to each company across all funds, not just per fund.
Duplicated money
For each company, one fund is the main source; anything the other funds add on top is duplication. Summed up, it answers a blunt question: how much of your money simply repeats a bet you already hold elsewhere.
Active share vs an index
Compare your consolidated portfolio to an index like Nifty 50. High replication means you are paying active fees for holdings you could buy in a cheap index fund.