diff --git a/lib/createPartition.ts b/lib/createPartition.ts
index 35ca39d..3e0f75f 100644
--- a/lib/createPartition.ts
+++ b/lib/createPartition.ts
@@ -15,6 +15,7 @@ export function createPartition (tokens?: RenderToken[]): Partition {
     pattern: '',
     int_max: 0,
     frac_max: 0,
+    frac_min: 0,
     man_p: '',
     num_p: '',
     num_min: 0,
diff --git a/lib/formatInfo.ts b/lib/formatInfo.ts
index bad0d37..a581d6b 100644
--- a/lib/formatInfo.ts
+++ b/lib/formatInfo.ts
@@ -65,6 +65,7 @@ export function info (partitions: Partition[], currencyId?: string): FormatInfo
     isText: isText(partitions),
     isPercent: isPercent(partitions),
     maxDecimals: partPos.general ? 9 : frac_max,
+    minDecimals: partPos.general ? 0 : partPos.frac_min,
     scale: partPos.scale ?? 1,
     color: 0,
     parentheses: 0,
diff --git a/lib/parseFormatSection.ts b/lib/parseFormatSection.ts
index 407f506..0ac4d80 100644
--- a/lib/parseFormatSection.ts
+++ b/lib/parseFormatSection.ts
@@ -470,6 +470,7 @@ export function parseFormatSection (inputTokens: Token[]) {
   }
   part.int_min = min;
   part.frac_max = fracPattern.length;
+  part.frac_min = countNonHash(fracPattern);
 
   let num_pat = part.num_pattern.join('');
   // let den_pat = part.den_pattern.join('');
diff --git a/lib/types.ts b/lib/types.ts
index 5b0bd26..4a629e7 100644
--- a/lib/types.ts
+++ b/lib/types.ts
@@ -134,6 +134,7 @@ export type Partition = {
   int_max: number,
   den_max: number,
   frac_max: number,
+  frac_min: number,
   date_eval: boolean,
   date_system: typeof EPOCH_1900 | typeof EPOCH_1317,
   dec_fractions?: boolean;
@@ -188,6 +189,8 @@ export type FormatInfo = {
   isPercent: boolean;
   /** The maximum number of decimals this format will emit. */
   maxDecimals: number;
+  /** The minimum number of decimal places this format will reserve. */
+  minDecimals: number;
   /**
    * 1 if the format uses color on the negative portion of the string, else
    * a 0. This replicates Excel's `CELL("color")` functionality.
diff --git a/test/info.spec.ts b/test/info.spec.ts
index 09709e7..7424ac4 100644
--- a/test/info.spec.ts
+++ b/test/info.spec.ts
@@ -6,6 +6,7 @@ const commonProps = {
   isText: false,
   isPercent: false,
   maxDecimals: 0,
+  minDecimals: 0,
   grouped: 0,
   parentheses: 0,
   color: 0,
@@ -42,6 +43,7 @@ test('getFormatInfo', () => {
     isText: false,
     isPercent: false,
     maxDecimals: 0,
+    minDecimals: 0,
     color: 0,
     scale: 1,
     parentheses: 0,
@@ -58,6 +60,7 @@ test('getFormatInfo', () => {
     isText: false,
     isPercent: false,
     maxDecimals: 0,
+    minDecimals: 0,
     scale: 1,
     color: 0,
     parentheses: 0,
@@ -73,6 +76,7 @@ test('getFormatInfo', () => {
     isText: false,
     isPercent: false,
     maxDecimals: 0,
+    minDecimals: 0,
     scale: 1,
     color: 0,
     parentheses: 0,
@@ -111,24 +115,49 @@ test('Numbers', () => {
   });
   assertInfo('0.0', {
     type: 'number',
+    minDecimals: 1,
     maxDecimals: 1,
     code: 'F1',
     level: 4
   });
+  assertInfo('0.#', {
+    type: 'number',
+    minDecimals: 0,
+    maxDecimals: 1,
+    code: 'F1',
+    level: 4
+  });
+  assertInfo('0.00##', {
+    type: 'number',
+    minDecimals: 2,
+    maxDecimals: 4,
+    code: 'F4',
+    level: 4
+  });
+  assertInfo('0.0?', {
+    type: 'number',
+    minDecimals: 2,
+    maxDecimals: 2,
+    code: 'F2',
+    level: 4
+  });
   assertInfo('0.000', {
     type: 'number',
+    minDecimals: 3,
     maxDecimals: 3,
     code: 'F3',
     level: 4
   });
   assertInfo('0.000000000000000', {
     type: 'number',
+    minDecimals: 15,
     maxDecimals: 15,
     code: 'F15',
     level: 4
   });
   assertInfo('0.0000000000000000', {
     type: 'number',
+    minDecimals: 16,
     maxDecimals: 16,
     code: 'F15',
     level: 4
@@ -143,6 +172,7 @@ test('Numbers', () => {
   });
   assertInfo('#,##0.00', {
     type: 'grouped',
+    minDecimals: 2,
     maxDecimals: 2,
     code: ',2',
     grouped: 1,
@@ -150,6 +180,7 @@ test('Numbers', () => {
   });
   assertInfo('(#,##0.00)', {
     type: 'grouped',
+    minDecimals: 2,
     maxDecimals: 2,
     code: ',2()',
     parentheses: 1,
@@ -159,6 +190,7 @@ test('Numbers', () => {
 
   assertInfo('0.00,"K"', {
     type: 'number',
+    minDecimals: 2,
     maxDecimals: 2,
     code: 'F2',
     scale: 0.001,
@@ -166,6 +198,7 @@ test('Numbers', () => {
   });
   assertInfo('0.00,,"K"', {
     type: 'number',
+    minDecimals: 2,
     maxDecimals: 2,
     code: 'F2',
     scale: 0.000001,
@@ -264,6 +297,7 @@ test('Currency', () => {
   assertInfo('#,##0.00 €', {
     type: 'currency',
     code: 'C2',
+    minDecimals: 2,
     maxDecimals: 2,
     grouped: 1,
     level: 10.4
@@ -271,6 +305,7 @@ test('Currency', () => {
   assertInfo('₿ 0.0000', {
     type: 'currency',
     code: 'C4',
+    minDecimals: 4,
     maxDecimals: 4,
     level: 10.4
   });
@@ -307,6 +342,7 @@ test('Percentages', () => {
     scale: 100,
     code: 'P2-',
     color: 1,
+    minDecimals: 2,
     maxDecimals: 2,
     level: 10.6
   });
@@ -321,6 +357,7 @@ test('Scientific', () => {
   assertInfo('0.00E+00', {
     type: 'scientific',
     code: 'S2',
+    minDecimals: 2,
     maxDecimals: 2,
     level: 6
   });
@@ -328,6 +365,7 @@ test('Scientific', () => {
     type: 'scientific',
     code: 'S1-',
     color: 1,
+    minDecimals: 1,
     maxDecimals: 1,
     level: 6
   });