Memoir vs Autobiography vs Biography: The Differences in One Table, and Which to Write

What is the difference between a memoir and an autobiography?

The short version: an autobiography is about a life, and a memoir is about an experience within a life. An autobiography asks 'What happened to me, from the beginning?' A memoir asks 'What did this part of my life mean?'

That one difference in scope changes almost everything else about the book: how it's structured, how it sounds, and who it's written for.

Biography vs autobiography vs memoir: what's the difference?

The quickest test is two questions. Who is writing? If it's the person who lived the life, it's an autobiography or a memoir. If it's someone else, it's a biography. How much of the life is covered? All of it points to autobiography (or most biographies). One part of it points to memoir.

Memoir vs biography: what's the difference?

A biography is written about a person; a memoir is written by one. Walter Isaacson's Steve Jobs (2011) was built on many interviews with Jobs and the people around him, and it is told in the third person by Isaacson. A memoir is told in the first person by the person who lived it, and it can include things no biographer could check, such as what the author was thinking in a given moment.

The line gets interesting when you write about someone close to you. A book about your mother's life, told from research and her letters, is closer to a biography. A book about your relationship with your mother, told from your side, is a memoir. Michelle Zauner's Crying in H Mart (2021) is about her mother, but it's a memoir because it's her story of losing her.

What is an autobiography?

An autobiography is the story of the author's life written by the author, usually from childhood to the time of writing. It aims to be complete: where you were born, how you grew up, your work, your family, the big events you lived through.

The classic examples come from public life. Benjamin Franklin's autobiography, written in the 18th century and published after his death, is one of the best known in English. Nelson Mandela's Long Walk to Freedom (1994) follows his life from his childhood village through his imprisonment and release.

But autobiographies aren't only for famous people. Many of the most treasured ones were never sold in a store: a grandfather's typed life story, handed out to the family at his 80th birthday. For that reader, completeness is the point.

What is a memoir?

A memoir is a true story drawn from the author's life, built around one slice of it. Joan Didion's The Year of Magical Thinking (2005) covers roughly one year after her husband's death. Cheryl Strayed's Wild (2012) centers on one long solo hike. Tara Westover's Educated (2018) follows her path from a childhood without school to a university education.

Because it covers less ground, a memoir can go deeper. It lingers on scenes, reconstructs conversations, and lets the older narrator reflect on what the younger self couldn't see. It reads more like a novel than a record.

A memoir also leaves things out on purpose. Westover doesn't need to tell you about every job she ever had. Anything that doesn't serve the book's central question stays out.

That selectivity is also why memoirs can be written at any age. You don't need to have lived a whole life to write one; you need one experience you've thought about long enough to understand. A 30-year-old can write a memoir about a first career. An autobiography usually waits until there's a life to look back on.

Where do personal essays and family histories fit?

Two more neighbors often get mixed into this comparison. A family history or legacy book gathers stories, photos and lessons about several generations, and often mixes autobiography with short biographies of relatives.

A personal essay is a short piece of true writing, usually a few thousand words, built around one moment or idea. Many memoirs start life as an essay that turned out to have more to say.

• Autobiography: your whole life, told by you.
• Memoir: one part of your life, told by you, focused on meaning.
• Biography: someone's life, told by someone else.
• Personal essay: one moment or idea from your life, told short.
• Family history or legacy book: often a mix, with stories, photos and lessons for the people who come after you.

Why do the labels blur?

In practice, 'memoir' has become the everyday label for most life writing, partly because 'autobiography' can sound dry. Michelle Obama's Becoming (2018), for example, covers her life from childhood onward, which is the scope of an autobiography, and is published and widely described as a memoir.

So don't worry about getting the label exactly right. What matters is the shape you choose: are you covering a whole life, or going deep into one part of it? Answer that, and the rest of your decisions follow.

How does the writing itself differ?

Put the same moment into each form and the difference is easy to hear. Take a family's move from the city to a farm in 1974.

Autobiography: 'In the spring of 1974 we left Chicago for my uncle's farm outside Ames, Iowa. My father took a job at the grain elevator, and my brother and I started at the county school that September.' It's clear, factual and moves on, because the book has forty more years to cover.

Memoir: 'The first night on the farm, I couldn't sleep for the quiet. In Chicago there had always been a bus, a siren, a neighbor's radio. Here there was nothing, and then, around midnight, a sound I later learned was a cow, and my brother laughing in the dark.' It slows down, stays in one moment, and lets the reader feel what the move meant.

Neither is better writing. An autobiography needs the first kind of sentence most of the time, with a few scenes like the second at key moments. A memoir needs the second kind most of the time, with short passages of the first to move between scenes.

Which should you write: memoir or autobiography?

Answer these questions in order. The first 'yes' is usually your answer.

1. Is the main reader your family, and do you want a complete record for them? Write an autobiography or a legacy book.
2. Is there one period of your life that changed you, and would you want strangers to read about it? Write a memoir.
3. Is the story really about someone else, such as a parent, mentor or ancestor? Write a biography, or a memoir about your relationship with them.
4. Is it one moment you could tell in 20 minutes? Write a personal essay first. It may grow into a book.

What does the same life look like as each kind of book?

Say your father spent ten years as a merchant sailor, then became a schoolteacher, then raised four children alone after your mother died.

His autobiography would run from his childhood to his retirement, maybe 20 chapters, each covering a stretch of years. A memoir by him might cover only the three years after his wife's death: learning to braid hair, burning dinners, the night the youngest finally slept through. A personal essay might be a single evening, the one where he taught you to read a tide table.

Same life, three different books. None is more valuable than the others. They just promise the reader different things.

How do you start either one in Novelleo?

In the Novelleo app (iOS and Android), choose "My own story" and answer a few questions: whose life it is, which years or theme it covers, and who you're writing it for. Novelleo sets up a title, premise, the people in the story and a 4–20 chapter plan. Keep it broad for an autobiography or narrow for a memoir.

The AI drafts each chapter with you, and you steer what comes next and edit every line. When it's finished, export it as a PDF or Word file to share or take to a printer.