Free Tool

Negotiation Calculator

Midpoints, brackets, round-by-round history, and range ladders — the math a mediator runs at the table. Everything stays in your browser.

1. Midpoint Calculator

Plaintiff demand

Defense offer

Current midpoint$0

Current spread$0

Midpoint − 10%$0

Midpoint + 10%$0

2. Bracket Calculator

Enter each side's bracket. See each midpoint, the difference, the midpoint of the two midpoints, whether they overlap — and the bracket drift versus your current negotiation midpoint (from section 1).

Plaintiff bracket — low

Plaintiff bracket — high

Defense bracket — low

Defense bracket — high

Plaintiff bracket midpoint$0

Defense bracket midpoint$0

Midpoint difference$0

Midpoint of midpoints$0

Bracket relationshipEnter both brackets

Bracket Drift—Enter the negotiation numbers (section 1) and both brackets to see bracket drift.

3. Negotiation History

Plaintiff demand

Defense offer

Note

Round	Plaintiff	Midpoint	Defense	Spread	Plaintiff moved	Defense moved	Gap closed	Efficiency	Note

Negotiation Corridor—Add rounds above to watch the corridor narrow.

Negotiation Efficiency—Add at least two rounds to see how efficiently each move advanced the settlement.

4. Bracket History

Save each plaintiff, defense, or mediator bracket and compare the bracket midpoints over time. Toggle Show convergence to see whether the two sides' brackets are closing the gap (▼ Converging) or pulling apart (▲ Diverging). A mediator bracket is logged as a reference — it shows “—” for convergence, since it's a neutral suggestion, not a side's position.

Party proposing bracket

Bracket low

Bracket high

Note

Round	Party	Low	Midpoint	High	Width	Midpoint change	Midpoint of current & prior	Convergence	Width change	Note

5. Range / Midpoint Ladder

Reduce the plaintiff number and raise the defense number by set increments, recalculating the midpoint each row — to plan brackets and next moves.

Plaintiff starting amount

Defense starting amount

Number of rows

Plaintiff reduction each row

Defense increase each row

Row	Plaintiff	Midpoint	Defense	Spread

Everything runs in your browser. Nothing you enter is sent to us or stored on our servers. History is saved locally on this device only.

This is the free version

In Loxmetis, this same calculator is tied to your case file — with settlement projections, party-movement analysis, and negotiations run live with both sides in separate rooms.

Explore Loxmetis

For general informational use by mediators and litigators. Not legal advice, and not a prediction of any outcome.