diff --git a/src/Duration.zig b/src/Duration.zig
index e16e521..e97c127 100644
--- a/src/Duration.zig
+++ b/src/Duration.zig
@@ -140,7 +140,7 @@ pub fn subtract(self: Duration, other: Duration) !Duration {
 
 /// Round the duration according to the specified options (Temporal.Duration.prototype.round).
 pub fn round(self: Duration, options: RoundingOptions, relative_to: RelativeTo) !Duration {
-    return wrapDuration(abi.c.temporal_rs_Duration_round(self._inner, options.toCApi(), relative_to));
+    return wrapDuration(abi.c.temporal_rs_Duration_round(self._inner, options.toCApi(), relative_to.toCApi()));
 }
 
 /// Round the duration with an explicit provider.
@@ -150,25 +150,27 @@ fn roundWithProvider(self: Duration, options: RoundingOptions, relative_to: Rela
 
 /// Compare two durations (Temporal.Duration.compare).
 pub fn compare(self: Duration, other: Duration, relative_to: RelativeTo) !i8 {
-    const res = abi.c.temporal_rs_Duration_compare(self._inner, other._inner, relative_to);
+    const res = abi.c.temporal_rs_Duration_compare(self._inner, other._inner, relative_to.toCApi());
     return abi.success(res) orelse return error.TemporalError;
 }
 
 /// Compare two durations with an explicit provider.
 fn compareWithProvider(self: Duration, other: Duration, relative_to: RelativeTo, provider: *const abi.c.Provider) !i8 {
-    const res = abi.c.temporal_rs_Duration_compare_with_provider(self._inner, other._inner, relative_to, provider);
+    const res = abi.c.temporal_rs_Duration_compare_with_provider(self._inner, other._inner, relative_to.toCApi(), provider);
     return abi.success(res) orelse return error.TemporalError;
 }
 
 /// Get the total value of the duration in the specified unit (Temporal.Duration.prototype.total).
-pub fn total(self: Duration, unit: Unit, relative_to: RelativeTo) !f64 {
-    const res = abi.c.temporal_rs_Duration_total(self._inner, unit.toCApi(), relative_to);
+pub fn total(self: Duration, options: TotalOptions) !f64 {
+    const relative_to = if (options.relative_to) |rt| rt.toCApi() else abi.c.RelativeTo{ .date = null, .zoned = null };
+    const res = abi.c.temporal_rs_Duration_total(self._inner, options.unit.toCApi(), relative_to);
     return abi.success(res) orelse return error.TemporalError;
 }
 
 /// Get the total value of the duration with an explicit provider.
-fn totalWithProvider(self: Duration, unit: Unit, relative_to: RelativeTo, provider: *const abi.c.Provider) !f64 {
-    const res = abi.c.temporal_rs_Duration_total_with_provider(self._inner, unit.toCApi(), relative_to, provider);
+fn totalWithProvider(self: Duration, options: TotalOptions, provider: *const abi.c.Provider) !f64 {
+    const relative_to = if (options.relative_to) |rt| rt.toCApi() else abi.c.RelativeTo{ .date = null, .zoned = null };
+    const res = abi.c.temporal_rs_Duration_total_with_provider(self._inner, options.unit.toCApi(), relative_to, provider);
     return abi.success(res) orelse return error.TemporalError;
 }
 
@@ -222,6 +224,19 @@ pub const PartialDuration = abi.c.PartialDuration;
 pub const RelativeTo = extern struct {
     plain_date: ?*abi.c.PlainDate,
     zoned_date_time: ?*abi.c.ZonedDateTime,
+
+    fn toCApi(self: RelativeTo) abi.c.RelativeTo {
+        return .{
+            .date = self.plain_date,
+            .zoned = self.zoned_date_time,
+        };
+    }
+};
+
+/// Options for Duration.total() providing unit and relative-to context.
+pub const TotalOptions = struct {
+    unit: Unit,
+    relative_to: ?RelativeTo = null,
 };
 
 // --- Public type aliases and enums ------------------------------------------
diff --git a/src/main.zig b/src/main.zig
index 7ecb9a2..75c6025 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -3,14 +3,56 @@ const Temporal = @import("temporalz");
 
 pub fn main() !void {
     const allocator = std.heap.page_allocator;
-    const result = try Temporal.Instant.init(1_704_067_200_000_000_000); // 2024-01-01 00:00:00 UTC
-    defer result.deinit();
 
-    std.debug.print("Instant.epoch_milliseconds: {}\n", .{result.epoch_milliseconds});
-    std.debug.print("Instant.epoch_nanoseconds: {}\n", .{result.epoch_nanoseconds});
-    const instant_str = try result.toString(allocator, .{});
-    std.debug.print("Instant.toString(): {s}\n", .{instant_str});
+    // --- Instant --- //
+    const instant = try Temporal.Instant.init(1_704_067_200_000_000_000); // 2024-01-01 00:00:00 UTC
+    defer instant.deinit();
 
+    std.debug.print(
+        \\Instant
+        \\
+        \\ - milliseconds: {}
+        \\ - nanoseconds: {}
+        \\ - toString(): {s}
+        \\
+        \\
+    , .{
+        instant.epoch_milliseconds,
+        instant.epoch_nanoseconds,
+        try instant.toString(allocator, .{}),
+    });
+
+    // --- Duration --- //
     const dur = try Temporal.Duration.from("P1Y2M3DT4H5M6S");
     defer dur.deinit();
+
+    std.debug.print(
+        \\Duration
+        \\
+        \\ - nanoseconds: {}
+        \\ - miliseconds: {}
+        \\ - seconds: {}
+        \\ - minutes: {}
+        \\ - hours: {}
+        \\ - days: {}
+        \\ - weeks: {}
+        \\ - months: {}
+        \\ - years: {}
+        \\ - toString(): {s}
+        \\ - total(): {{}}
+        \\
+        \\
+    , .{
+        dur.nanoseconds(),
+        dur.milliseconds(),
+        dur.seconds(),
+        dur.minutes(),
+        dur.hours(),
+        dur.days(),
+        dur.weeks(),
+        dur.months(),
+        dur.years(),
+        try dur.toString(allocator, .{}),
+        // try dur.total(.{ .unit = .minute }),
+    });
 }
diff --git a/src/root.zig b/src/root.zig
index 01bc520..0a5b051 100644
--- a/src/root.zig
+++ b/src/root.zig
@@ -76,6 +76,7 @@ test Duration {
         "RoundingOptions",
         "ToStringRoundingOptions",
         "Sign",
+        "TotalOptions",
     };
 
     try assertDecls(Duration, checks);