Age Difference Calculator
Authors & editorial team

The people behind the byline

Articles on Age Difference Calculator are published under our collective The Editorial Team byline — but that team has names. Meet the editors, engineers, and researchers who build the tools and stand behind every number.

Our authors

Portrait of Avery Sinclair, Editorial Lead at Age Difference Calculator

Avery Sinclair

Editorial Lead

  • 10+ yrs editorial
  • Style & accuracy lead

Avery shapes every guide on the site, turning fiddly calendar math into explanations anyone can follow. She sets the editorial standard: show the working, cite the source, and never overstate what a number means.

FocusPlain-English explanations, editorial standards, what results actually mean.

Explainer writingEditorial standardsDate & calendar concepts
Portrait of Daniel Foster, Senior Editor & Reviewer at Age Difference Calculator

Daniel Foster

Senior Editor & Reviewer

  • 15+ yrs software & technical writing
  • U.S.-based reviewer

Daniel reviews and bylines the site's guides from the United States, pairing a software background with a stickler's eye for date math. Before anything publishes, he re-derives the worked examples by hand and checks every figure against the live calculator — if a number can't survive that, it doesn't ship.

FocusReviewing guides for accuracy, worked examples, and date-math correctness.

Calendar arithmeticLeap-year & month-end edge casesTechnical editing
Portrait of Marcus Reed, Engineering Lead at Age Difference Calculator

Marcus Reed

Engineering Lead

  • Software engineer
  • Privacy-by-design

Marcus builds the calculation engine that powers the tools. He's the reason a span crossing February 29th or a month-end rollover comes out exactly right rather than rounded.

FocusThe calculation engine, leap-year handling, performance and privacy.

Date algorithmsLeap-year & edge casesFront-end performance
Portrait of Lena Cho, Data & Research Editor at Age Difference Calculator

Lena Cho

Data & Research Editor

  • Research background
  • Citations & sources

Lena tracks down the statistics we cite — from Census spousal-age data to peer-reviewed studies — and makes sure every claim links back to a source you can check yourself.

FocusSourcing statistics, citations, keeping claims verifiable.

Research & sourcingDemographic dataFact-checking
Portrait of Tomas Andersson, QA & Accuracy Editor at Age Difference Calculator

Tomas Andersson

QA & Accuracy Editor

  • QA & testing
  • Accuracy sign-off

Tomas tries to break every calculator before you use it — feeding in twins, leap-day births, and same-day edge cases — so the result you see has already survived the hard scenarios.

FocusTesting results against edge cases, regression checks, accuracy sign-off.

Quality assuranceEdge-case testingRegression checks
How we work

Our editorial & fact-checking process

Accuracy is the whole point of a calculator. Here’s the path every tool and guide takes before you see it.

  1. 1

    Research

    Every guide starts from primary sources — official statistics, standards bodies, and the math itself — not from other calculator sites.

  2. 2

    Build & verify

    The engineering team implements each formula and checks it against hand-worked examples, including leap years and month-end rollovers.

  3. 3

    Edit for clarity

    An editor rewrites the explanation in plain language and adds the context that answers 'so what does this number mean?'

  4. 4

    Accuracy review

    QA re-tests the live tool against edge cases and we add a 'last reviewed' date. We revisit content as standards or data change.

Published work

Guides from our team

Browse all guides →