40 tools
Valuation & investment
DCF, NPV and IRR
Cash flows in, with a discount-rate sensitivity table and an NPV profile.
Valuation multiples
Comparable multiples and the implied value they put on a business.
Waterfall chart
A bridge from one figure to another, built from the movements between.
Cash runway
How long the money lasts at a given burn, and what changes that.
Debt & lending
Loan amortisation
A full schedule: interest, principal and balance, period by period.
Loan comparison
Two or more offers set against each other on total cost, not headline rate.
Mortgage overpayment
What paying extra actually saves, in interest and in years.
Debt payoff
Snowball against avalanche, on your own balances.
Fixed income
Bond calculator
Price, yield and accrued interest from the terms of the instrument.
Duration and convexity
How much a bond moves for a change in yield, and how that itself changes.
Yield curve
Plot a curve and read what its shape is saying.
Fixed deposit ladder
Stagger maturities so cash comes back at intervals rather than all at once.
Banking & risk
Currency & rates
FX hedging cost
What forward cover costs, against carrying the exposure.
FX return comparator
The same return in two currencies, once translation is honest about itself.
Rate converter
Nominal to effective, annual to monthly, and back.
Real return
What a return is worth after inflation has taken its share.
Working numbers
Budget vs actual
Paste a budget and an actual and read the variance between them.
Petty cash
A float, its movements, and whether it reconciles.
Statement categoriser
Sort a bank statement into categories you decide.
Percentage toolkit
Change, margin, mark-up and reverse percentage, without the arithmetic.
Number to words
Figures written out, for cheques and contracts.
Data preparation
Two-list reconciler
Match two lists and show what is in one and not the other.
Quick pivot
Summarise a pasted table without opening a spreadsheet.
Table diff
What changed between two versions of the same table.
Table scrubber
Strip a pasted table of the things that stop it being a table.
Column profiler
What is actually in a column: types, blanks, outliers and repeats.
Column splitter and merger
Break one column into several, or join several into one.
Duplicate finder
Find repeats across a list, exact or near.
Charting
Sri Lanka
Personal
These are provided as they are, for working things out. They are not part of Aether’s audited model engine and their results are not checked against it. Satisfy yourself that a number is right before you rely on it — and for anything touching tax, statutory entitlements or a reported provision, check it against the current rules or with somebody qualified.
These answer one question each
Aether answers the ones that depend on each other — a model that ties, actuals against budget, and cash by week.