diff --git a/README.md b/README.md
index 32748bd..afb52ac 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 Log your daily hours, see how much you are over/under your weekly target,
 and keep a running balance of extra/minus hours.
 
-- Enter each day as a **total** (`7.5`, `7:15`, `7h15`; 0–24 h) — the default — or as
+- Enter each day as a **total** (`7.15`, `7:15`, `7h15` = 7 h 15 min; `7.5` = 7 h 30 min; 0–24 h) — the default — or as
   **start–end + break**, or mark it **off** (vacation, sick, holiday → no target).
 - Full-time target defaults to **36 h 15 min/week** (7:15 per weekday).
 - **Workload periods** (Settings) scale the target from a given date, e.g. 50% or 25%.
diff --git a/e2e/hours.spec.ts b/e2e/hours.spec.ts
index 614a190..dffef6f 100644
--- a/e2e/hours.spec.ts
+++ b/e2e/hours.spec.ts
@@ -35,6 +35,8 @@ test.describe('entering total hours', () => {
   for (const [typed, minutes] of [
     ['7.5', 450],
     ['7,5', 450],
+    ['7.30', 450],
+    ['7,30', 450],
     ['7:30', 450],
     ['7h30', 450],
     ['7h 30min', 450],
diff --git a/frontend/calc.ts b/frontend/calc.ts
index 233952e..3ebff25 100644
--- a/frontend/calc.ts
+++ b/frontend/calc.ts
@@ -37,8 +37,10 @@ export function weekDays(monday: string): string[] {
 // ---------- Durations ----------
 
 /**
- * Parses "7.5", "7,5", "7:30", "7h30", "7h 30min", "45m" or "-1:30" into minutes.
- * Returns null for anything it does not understand; "" also returns null.
+ * Parses "7.5", "7,5", "7.15", "7:30", "7h30", "7h 30min", "45m" or "-1:30" into minutes.
+ * Two digits after "." or "," are minutes like after ":" ("7.15" = 7 h 15 min); one digit is
+ * a decimal hour ("7.5" = 7 h 30 min). Returns null for anything it does not understand;
+ * "" also returns null.
  */
 export function parseDuration(input: string): number | null {
   const s = input.trim().toLowerCase().replace(/\s+/g, '');
@@ -47,11 +49,11 @@ export function parseDuration(input: string): number | null {
   const body = s.replace(/^[+-]/, '');
 
   let m: RegExpMatchArray | null;
-  if ((m = body.match(/^(\d+)(?:[.,](\d+))?h?$/))) {
-    return sign * Math.round(parseFloat(`${m[1]}.${m[2] ?? '0'}`) * 60);
+  if ((m = body.match(/^(\d+)(?:[.,](\d))?h?$/))) {
+    return sign * (Number(m[1]) * 60 + Number(m[2] ?? 0) * 6);
   }
-  if ((m = body.match(/^(\d+):(\d{1,2})$/)) && Number(m[2]) < 60) {
-    return sign * (Number(m[1]) * 60 + Number(m[2]));
+  if ((m = body.match(/^(\d+)(?::(\d{1,2})|[.,](\d{2}))$/)) && Number(m[2] ?? m[3]) < 60) {
+    return sign * (Number(m[1]) * 60 + Number(m[2] ?? m[3]));
   }
   if ((m = body.match(/^(\d+)h(\d{1,2})(?:m|min)?$/)) && Number(m[2]) < 60) {
     return sign * (Number(m[1]) * 60 + Number(m[2]));
diff --git a/frontend/components/DurationInput.tsx b/frontend/components/DurationInput.tsx
index fdaf214..013fee5 100644
--- a/frontend/components/DurationInput.tsx
+++ b/frontend/components/DurationInput.tsx
@@ -12,7 +12,7 @@ interface Props {
 }
 
 /**
- * Free-text duration field ("7.5", "7:15", "7h15"). Valid input is committed as you type;
+ * Free-text duration field ("7.5", "7.15", "7:15", "7h15"). Valid input is committed as you type;
  * on blur the text is normalised to h:mm. Invalid text is kept and outlined until fixed.
  */
 export function DurationInput({ value, onChange, placeholder, ariaLabel, min = -Infinity, max = Infinity }: Props) {
diff --git a/tests/frontend/calc.test.ts b/tests/frontend/calc.test.ts
index 72c5bc0..69a423f 100644
--- a/tests/frontend/calc.test.ts
+++ b/tests/frontend/calc.test.ts
@@ -35,7 +35,11 @@ const fullWeek = (minutes: number) =>
 describe('parseDuration', () => {
   it.each([
     ['7.5', 450],
-    ['7,25', 435],
+    ['7,5', 450],
+    ['7.15', 435],
+    ['7,15', 435],
+    ['7.45', 465],
+    ['7.05', 425],
     ['7:15', 435],
     ['7h15', 435],
     ['7h 15min', 435],
@@ -45,7 +49,9 @@ describe('parseDuration', () => {
     ['8', 480],
   ])('%s -> %i', (input, expected) => expect(parseDuration(input)).toBe(expected));
 
-  it.each(['', 'abc', '7:75', '7h99'])('rejects %j', (input) => expect(parseDuration(input)).toBeNull());
+  it.each(['', 'abc', '7:75', '7h99', '7.75', '7.123'])('rejects %j', (input) =>
+    expect(parseDuration(input)).toBeNull(),
+  );
 });
 
 describe('formatting', () => {